Precalculus Mathematics Homework Help Forum

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Free pre-calculus mathematics homework help from qualified mentors. Math courses prior to calculus homework. Please use the template when requesting help and show your work.
Proof about two disjoint non-empty sets ## S ## and ## T ##
  • Math100
  • · Replies 11 ·
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Divisibility Test: Determine if a Number is Divisible by 6, 8, 4
  • Zaza
  • · Replies 7 ·
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7
Proving the result of the following limit
  • Rikudo
  • · Replies 10 ·
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10
Express the given matrix in the form ##L_1DU_1##
  • chwala
  • · Replies 9 ·
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9
Finding square root of number i.e. ##\sqrt{\dfrac{16}{64}}##
  • chwala
  • · Replies 17 ·
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17
Finding the nth term of a sequence
  • chwala
  • · Replies 12 ·
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12
Without evaluating the Legendre symbols, prove the following....
  • Math100
  • · Replies 14 ·
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14
Prove that there are infinitely many primes of the form ## 8k-1 ##
  • Math100
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4
Prove relation between the group of integers and a subgroup
  • PhysicsRock
  • · Replies 6 ·
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6
Solving Simultaneous Equations: 4x + 5y =12 and -8x + 4y =32
  • paulb203
  • · Replies 4 ·
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4
How many birds of each kind did I buy?
  • Math100
  • · Replies 5 ·
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5
How do we get from one step to another in these factorial equations?
  • homeworkhelpls
  • · Replies 25 ·
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25
Solve the given trigonometry problem
  • chwala
  • · Replies 10 ·
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10
Determine the set of odd primes ## p ##?
  • Math100
  • · Replies 14 ·
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14
Binary operation on equivalence classes
  • PhysicsRock
  • · Replies 3 ·
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3
Find all possible solutions of x^3 + 2 = 0
  • BurpHa
  • · Replies 9 ·
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9
Find all the solutions of the congruence
  • Math100
  • · Replies 6 ·
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6
Show that ## p ## divides ## 2^{(p-1)/2}-1 ##
  • Math100
  • · Replies 1 ·
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1
Proof of Inequality: Induction & Derivation Help
  • PhysicsRock
  • · Replies 12 ·
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12
Evaluate the Legendre symbol ## (999|823) ##
  • Math100
  • · Replies 3 ·
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3
Finding the Distance to a Building with Trigonometry
  • RayDonaldPratt
  • · Replies 4 ·
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4
Finding the Volume of a Slightly non-Rectangular Box
  • LightningInAJar
  • · Replies 19 ·
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19
What does the identity mean here?
  • PhysicsRock
  • · Replies 3 ·
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3
Verify that ## A(225)\geq 1 ##
  • Math100
  • · Replies 1 ·
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1
F(x)=(x+1)^0.5, h(x)=x^2+3, what is the range of f(h(x))?
  • Darkmisc
  • · Replies 4 ·
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4
Verify that ## L(1, \chi)\neq 0 ##
  • Math100
  • · Replies 4 ·
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4
Evaluating several powers of ##x## from a given equation
  • brotherbobby
  • · Replies 6 ·
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6
Analysis of the mechanics of skydiving
  • huc369
  • · Replies 1 ·
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1
How to construct a table of values for Dirichlet characters?
  • Math100
  • · Replies 18 ·
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18
Show that (a-b) + (c-d) = -(b+d) - (-a-c)
  • happyprimate
  • · Replies 6 ·
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6
What is the formula for finding the nth partial sum?
  • mark2142
  • · Replies 15 ·
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15
Master Factorization with Step-by-Step Guide for x^4 - 3x^2 - 4
  • Nathi ORea
  • · Replies 19 ·
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19
How Do You Calculate Angles AEC and ADC in Geometry?
  • chwala
  • · Replies 8 ·
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8
Find the remainder when ## 823^{823} ## is divided by ## 11 ##
  • Math100
  • · Replies 14 ·
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14
Solve the given simultaneous equations that involves hyperbolas
  • chwala
  • · Replies 4 ·
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4
Calculate the position vector for 3di
  • homeworkhelpls
  • · Replies 1 ·
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1
Question about vector coordinates
  • homeworkhelpls
  • · Replies 4 ·
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4
Inequality involving a reciprocal - where's the mistake?
  • brotherbobby
  • · Replies 12 ·
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12
Solve the simultaneous linear congruences
  • Math100
  • · Replies 4 ·
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4
Conditional probability problem
  • MathMan2022
  • · Replies 15 ·
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15
Solving an inequality involving absolute values
  • brotherbobby
  • · Replies 11 ·
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11
Solve the given permutation problem
  • chwala
  • · Replies 1 ·
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1
Find the highest power of ## 3 ## dividing ## 823 ##
  • Math100
  • · Replies 9 ·
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9
Proving that the inverse of a rational number exists
  • brotherbobby
  • · Replies 8 ·
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8
Prove the trigonometry identity and hence solve given problem
  • chwala
  • · Replies 5 ·
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5
Set properties of even (##E##) and odd (##I##) integers
  • brotherbobby
  • · Replies 5 ·
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5
Find the length of PA - deductive Geometry
  • chwala
  • · Replies 1 ·
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1
Help simplifying this algebraic expression please
  • homeworkhelpls
  • · Replies 4 ·
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4
Prove that ## li(x)\sim \frac{x}{\log x} ##.
  • Math100
  • · Replies 3 ·
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3
Determine the day of the week on which you were born
  • Math100
  • · Replies 18 ·
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18
Graph Sin(2x+6): Is Parent Function the Best Option?
  • barryj
  • · Replies 6 ·
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6
Find the constants ## A ## and ## B ##
  • Math100
  • · Replies 1 ·
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1
Using this Libre Calc statement: =if(B4=50,100)
  • barryj
  • · Replies 3 ·
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3
Prove that ## \sum_{n\leq x}\frac{\phi(n)}{\sqrt{n}}=Cx^{3/2}+.... ##.
  • Math100
  • · Replies 4 ·
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4
Solving an equality with absolute values
  • brotherbobby
  • · Replies 10 ·
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10
How to find the constant B in here?
  • Math100
  • · Replies 7 ·
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7
Prove that the altitudes of a triangle are concurrent
  • Darkmisc
  • · Replies 3 ·
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3
Use Euler's summation formula to prove the following....
  • Math100
  • · Replies 17 ·
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17
Verify this result when ## n=10 ##
  • Math100
  • · Replies 8 ·
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8
Apply trigonometric methods in solving problems
  • Elara04
  • · Replies 1 ·
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1
Checking My Understanding of the Naive Bayes Theorem
  • jisbon
  • · Replies 1 ·
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1
Solving trigonometry equation involving half-angle
  • songoku
  • · Replies 42 ·
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Prove that ## \sum_{d\mid n} f(d)=\sum_{d\mid n} f(\frac{n}{d}) ##.
  • Math100
  • · Replies 5 ·
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5
Why does the dot product in this solution equal zero?
  • Darkmisc
  • · Replies 3 ·
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3
How to find out the sin value from cos
  • rssvn
  • · Replies 9 ·
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9
Every S-composite can be expressed as a product of S-primes
  • Math100
  • · Replies 13 ·
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13
How can we prove the bac-cab rule using a geometrical derivation?
  • ady
  • · Replies 7 ·
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7
Prove that ## \sum_{d\mid n}\sigma_{1}(d)\sigma_{1}(\frac{n}{d}) ##
  • Math100
  • · Replies 20 ·
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20
Prove by the principle of induction
  • acrobaticelectron
  • · Replies 14 ·
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14
Where is the mistake in my probability calculation for a 20cm string cut?
  • songoku
  • · Replies 2 ·
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2
Problem set with 5 proofs involving odd, even, parity, etc.
  • deme76
  • · Replies 4 ·
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4
Determine all integers ## n ##
  • Math100
  • · Replies 10 ·
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10
Precise definition of tangent line to a curve
  • MiddleEast
  • · Replies 18 ·
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18
Is the following true, for each positive integer ## k ##?
  • Math100
  • · Replies 19 ·
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19
Use the Euclidean algorithm to find integers ## a, b, c ##
  • Math100
  • · Replies 5 ·
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5
True or False Question about Square Matrices
  • TheScienceAlliance
  • · Replies 1 ·
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1
Prove that ## 4\mid \sigma_{1}(4k+3) ##
  • Math100
  • · Replies 5 ·
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5
Determine (with proof) the set of all prime numbers
  • Math100
  • · Replies 3 ·
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3
Determine all integers ## n ## for which ## \phi(n)=16 ##
  • Math100
  • · Replies 14 ·
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14
Prove that ## n ## must be a power of ## 2 ##
  • Math100
  • · Replies 15 ·
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15
Find the values of a real number ##a## for an inequality to hold
  • brotherbobby
  • · Replies 7 ·
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7
Prove that ## 1^{p-1}+2^{p-1}+3^{p-1}+\dotsb +(p-1)^{p-1}\equiv -1 ##.
  • Math100
  • · Replies 1 ·
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1
Establish that ## a\equiv b\pmod {p} ##
  • Math100
  • · Replies 8 ·
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8
Prove that ## 1835^{1910}+1986^{2061}\equiv 0\pmod {7} ##
  • Math100
  • · Replies 19 ·
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19
Rationalizing this fraction involving square roots
  • songoku
  • · Replies 3 ·
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3
Probability of selecting two white balls from two bags
  • vcsharp2003
  • · Replies 2 ·
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2
Verify that ## x\equiv a^{p-2}b\pmod {p} ## is a solution
  • Math100
  • · Replies 6 ·
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6
Solve the given trigonometry equation
  • chwala
  • · Replies 1 ·
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1
Prove that ## a^{3}+1 ## is divisible by ## 7 ##.
  • Math100
  • · Replies 1 ·
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Probability that A will win given a condition
  • vcsharp2003
  • · Replies 15 ·
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15
Verify that ## a^{5} ## and ## a ## have the same units digit
  • Math100
  • · Replies 1 ·
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Show that ## 60 ## divides ## a^{4}+59 ##
  • Math100
  • · Replies 2 ·
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2
Find the units digit of ## 3^{100} ## by the use of Fermat's theorem
  • Math100
  • · Replies 1 ·
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1
Derive ## a^{7}\equiv a\pmod {42} ## for all ## a ##
  • Math100
  • · Replies 6 ·
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6
Pattern of variables with absolute value exponents
  • mcastillo356
  • · Replies 6 ·
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6
Derive the following congruence....
  • Math100
  • · Replies 3 ·
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3
Show that ## 168=3\cdot 7\cdot 8 ## divides ## a^{6}-1 ##
  • Math100
  • · Replies 4 ·
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4
Deduce that ## 13\mid (11^{12n+6}+1) ##
  • Math100
  • · Replies 2 ·
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Show that ## 133\mid (a^{18}-b^{18}) ##.
  • Math100
  • · Replies 3 ·
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3
Show that ## a^{12}\equiv 1\pmod {35} ##.
  • Math100
  • · Replies 1 ·
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1