General Math Forum

Post thread
Join in expert discussion on general math topics that are not applicable to the specific categories. This includes topics are usually high school math level. Homework help is available.

Math Proof Training and Practice

A gap in resources that should help students visualise mathematics

Math Guides, Tutorials and Articles

MHB Deriving the first and second order Newton-Cotes formulas

Math Problem of the Week

Undergrad Sum of an Alternating Series
MHB Conversion KWH of energy per day to Joules in a year
  • · Replies 1 ·
Replies
1
Views
3K
High School Examples of Non-Algorithmic Math in Penrose's Book?
  • · Replies 12 ·
Replies
12
Views
4K
Undergrad How do I factorise polynomials using a new method?
  • · Replies 15 ·
Replies
15
Views
2K
High School Index numbers vs. Quantity in a group
  • · Replies 3 ·
Replies
3
Views
1K
MHB How Are Tangents to a Circle Found and Their Intersection Point Determined?
  • · Replies 5 ·
Replies
5
Views
2K
MHB Powers function n^5+n^4=(n^5−n^3)(n−1)−(n−2)
  • · Replies 5 ·
Replies
5
Views
3K
MHB Three Consecutive Odd Integers
  • · Replies 5 ·
Replies
5
Views
2K
MHB What is the joy of lifelong learning in math?
  • · Replies 4 ·
Replies
4
Views
2K
MHB Convert blueprint measurements to usable feet and inches.
  • · Replies 1 ·
Replies
1
Views
2K
MHB Reaction between mgso4 +k2co3?
  • · Replies 4 ·
Replies
4
Views
4K
Undergrad Intersecting Planes: Is It Possible?
  • · Replies 5 ·
Replies
5
Views
2K
High School Trigonometry Identity Question
  • · Replies 9 ·
Replies
9
Views
2K
MHB Proving an Infinite Number of Integer Points on a Level Surface
  • · Replies 1 ·
Replies
1
Views
2K
MHB Find The Distance And Speed By Using The Work And Energy Theorem
  • · Replies 12 ·
Replies
12
Views
4K
MHB Why Does Cyclohexane Float on Water When Its Molecular Mass is Higher?
  • · Replies 2 ·
Replies
2
Views
4K
High School Finitism and .999....=1 question
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad What kinds of hobbies could I do with that involve math?
  • · Replies 9 ·
Replies
9
Views
10K
MHB Evaluating $(-1)^k {3n \choose k}$ Sums
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Should I get a new graphing calculator?
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Question about Euclid's parallel postulate (5th postulate).
  • · Replies 16 ·
Replies
16
Views
4K
MHB Solve Polynomial Scale: Find a,b,c,d
  • · Replies 4 ·
Replies
4
Views
2K
High School What are some real world example of these equations?
  • · Replies 8 ·
Replies
8
Views
3K
Undergrad Two square scale meeting point, when one is moved odd
  • · Replies 5 ·
Replies
5
Views
1K
Undergrad What is the Binomial Theorem and How is it Proven?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Newton's Generalized Binomial Theorem
  • · Replies 3 ·
Replies
3
Views
2K
High School Why Does This Number Pattern Always Result in 6?
  • · Replies 1 ·
Replies
1
Views
1K
MHB What are the tensions in the strings of an accelerating elevator?
  • · Replies 1 ·
Replies
1
Views
2K
  • Poll Poll
MHB TikZ Challenge 1 - Geometrical Diagram - Votes
  • · Replies 1 ·
Replies
1
Views
2K
MHB Simple Law of Cosines Question
  • · Replies 2 ·
Replies
2
Views
2K
High School Can this equation be simplified?
  • · Replies 7 ·
Replies
7
Views
2K
MHB What are the Variables Needed to Solve a Pulley System Problem?
  • · Replies 2 ·
Replies
2
Views
10K
MHB Smallest Number Divisible by 99 Using Digits 1-9
  • · Replies 1 ·
Replies
1
Views
2K
MHB Find n such that both n+3 and n^2+3 are perfect cubes
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Best equations to analyze using Big O
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Why use i to represent y vector ?
  • · Replies 6 ·
Replies
6
Views
2K
MHB How Can a Third Grader Identify Marks on a Number Line?
  • · Replies 4 ·
Replies
4
Views
3K
MHB What is the Simplified Form of This Trigonometric Identity?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Where has this proof gone wrong? ∞= 1/0
  • · Replies 36 ·
2
Replies
36
Views
5K
MHB Finding the force on an inclined plane
  • · Replies 10 ·
Replies
10
Views
3K
Undergrad Prove that only one straight line passes through two point
  • · Replies 2 ·
Replies
2
Views
2K
MHB Questions about proof about primality testing
  • · Replies 16 ·
Replies
16
Views
3K
MHB Counting Squares Challenge: Proving Formula and Evaluating Sum
  • · Replies 2 ·
Replies
2
Views
2K
MHB How Many Numbers Less Than 1000 Divisible by 5 Are Formed Using Unique Digits?
  • · Replies 1 ·
Replies
1
Views
2K
High School How do I calculate the Impact Force of an object?
  • · Replies 7 ·
Replies
7
Views
2K
High School Product of Negative Real Numbers: A Geometric Proof
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad What is the solution to the Binary puzzle in World of Warcraft?
  • · Replies 3 ·
Replies
3
Views
3K
MHB Which Prime Numbers Make p^2 + 1007 Have Less Than 7 Divisors?
  • · Replies 2 ·
Replies
2
Views
2K
MHB A question about powers n^2+n^3=n^4−n^2(n−1)
  • · Replies 2 ·
Replies
2
Views
2K
High School What is the reality of the scalar product?
  • · Replies 10 ·
Replies
10
Views
2K
MHB Can X^3 Equal sqrt{81} with MathMagic Lite?
  • · Replies 5 ·
Replies
5
Views
2K
MHB Polynomial in n variables: Prove the identity
  • · Replies 1 ·
Replies
1
Views
1K
High School How to solve log(x)+2x=2 for x?
  • · Replies 9 ·
Replies
9
Views
2K
MHB Proving Identity: $\sin^8A-\cos^8A$
  • · Replies 1 ·
Replies
1
Views
2K
MHB Titration Question: I'm Confused!
  • · Replies 7 ·
Replies
7
Views
4K
Undergrad Use of irrational numbers for coordinate system
  • · Replies 7 ·
Replies
7
Views
3K
High School Quadratic Equation with three variables
  • · Replies 3 ·
Replies
3
Views
6K
High School Conical Representation of Sphere
  • · Replies 5 ·
Replies
5
Views
2K
High School Hypothetical 3 Dimensional Coordinates
  • · Replies 1 ·
Replies
1
Views
2K
High School Can you solve this geometry problem for nine year olds?
  • · Replies 30 ·
2
Replies
30
Views
10K
MHB Prove Identity: $\frac{\cos A - \sin A}{\cos A + \sin A}$
  • · Replies 2 ·
Replies
2
Views
2K
MHB What is the identity being proved?
  • · Replies 2 ·
Replies
2
Views
2K
MHB Can You Solve These Pythagorean Quadruples?
  • · Replies 2 ·
Replies
2
Views
2K
MHB (3+√a)^(1/3)+(3-√a)^(1/3) is an integer, find a
  • · Replies 4 ·
Replies
4
Views
2K
MHB Simple Model of 9/11/2001 World Trade Center Collapse
  • · Replies 8 ·
Replies
8
Views
4K
MHB Non-Negative Rational Solutions for x^y * y^x = y^y Equation
  • · Replies 3 ·
Replies
3
Views
2K
MHB Number of steps of euclidean algorithm
  • · Replies 4 ·
Replies
4
Views
4K
MHB Product of integers that are relatively prime to m
  • · Replies 22 ·
Replies
22
Views
5K
MHB Charge & Valency of Chemistry Formulas: Explained
  • · Replies 5 ·
Replies
5
Views
4K
MHB Compositions, Inverses and Combinations of Functions
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Calibration of axis for Oragami folds
  • · Replies 4 ·
Replies
4
Views
2K
MHB Find positive integers x,y,z in 1/x+1/y=7/8(x,y∈N)
  • · Replies 9 ·
Replies
9
Views
3K
MHB How do I find the point P on a circle with a slope of 2 from (0,0)?
  • · Replies 15 ·
Replies
15
Views
3K
MHB Trigonometry and periodic functions
  • · Replies 3 ·
Replies
3
Views
6K
MHB Integer-Sided Right Triangle: 2001 Leg Length & Minimum Other Leg Length
  • · Replies 2 ·
Replies
2
Views
2K
MHB Find x and y in x+y=3421 and 23% of x + 13.5% of y = 684.34
  • · Replies 1 ·
Replies
1
Views
1K
MHB What Is the Equation of a Line Parallel to 4x + 5y = 20 Passing Through (0,0)?
  • · Replies 28 ·
Replies
28
Views
4K
MHB Can You Find a Unique N for This Cubic and Quadratic Diophantine Equation?
  • · Replies 9 ·
Replies
9
Views
3K
MHB A finite number of positive integer solutions 1/x+1/y=p/q
  • · Replies 4 ·
Replies
4
Views
2K
MHB How do I write a linear equation from given information?
  • · Replies 13 ·
Replies
13
Views
4K
MHB How Do You Solve the Absolute Value Equation -3|x+5| + 1 = 7|x+5| + 8?
  • · Replies 3 ·
Replies
3
Views
2K
MHB How Do You Calculate the Slope of a Line with Given Coordinates and Area?
  • · Replies 2 ·
Replies
2
Views
2K
High School Solving Absolute Value Inequalities: How to Define Cases
  • · Replies 4 ·
Replies
4
Views
2K
MHB Can we use this method to efficiently check if $N$ is composite?
  • · Replies 29 ·
Replies
29
Views
5K
MHB Find an equation of the line that is perpendicular to x - y + 2 = 0
  • · Replies 5 ·
Replies
5
Views
2K
High School Difference between zero and identically zero
  • · Replies 12 ·
Replies
12
Views
16K
MHB The Acidic Mysteries of Temperature and H2O
  • · Replies 5 ·
Replies
5
Views
3K
MHB How Do You Find the Equation of a Line Through a Point and a Circle's Center?
  • · Replies 6 ·
Replies
6
Views
2K
MHB Why is the letter m used for slope instead of s?
  • · Replies 3 ·
Replies
3
Views
2K
MHB Prove a Polynomial has no real roots
  • · Replies 4 ·
Replies
4
Views
2K
MHB A Parallel Line Passing Through (-3, 4)
  • · Replies 6 ·
Replies
6
Views
2K
High School Tips on writing a formula in rigorous way
  • · Replies 2 ·
Replies
2
Views
1K
MHB How can I find the equation of a line given its x-intercept and y-intercept?
  • · Replies 10 ·
Replies
10
Views
3K
MHB I have a few more questions.No problem, happy to help!
  • · Replies 5 ·
Replies
5
Views
2K
MHB Finding the Equation of a Line Given a Point and Slope
  • · Replies 2 ·
Replies
2
Views
2K
MHB Equation of Circle in Standard Form
  • · Replies 6 ·
Replies
6
Views
2K
MHB Why Does the Square Root of a Squared Algebraic Term Equal the Term Itself?
  • · Replies 10 ·
Replies
10
Views
3K
MHB Equation of Circle Through Origin
  • · Replies 5 ·
Replies
5
Views
2K
MHB Prove that the radius of the incircle of △ is rational
  • · Replies 2 ·
Replies
2
Views
2K
MHB What is the perimeter of triangle ABC?
  • · Replies 13 ·
Replies
13
Views
4K
MHB Finding the Equation of a Tangent Circle with Center (3,5)
  • · Replies 2 ·
Replies
2
Views
2K