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 Understanding Inequalities: Why is Option C the Correct Answer?
  • · Replies 1 ·
Replies
1
Views
1K
MHB Determine the ratio of boys and girls
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Help solving Simulink numerical oscillation
  • · Replies 1 ·
Replies
1
Views
2K
MHB Is Isoperimetry as Simple as Symmetry?
  • · Replies 1 ·
Replies
1
Views
2K
MHB How can I determine the G 1:3 using given midpoints?
  • · Replies 5 ·
Replies
5
Views
2K
MHB Convert to a equation in RECTANGULAR coordinates
  • · Replies 4 ·
Replies
4
Views
2K
MHB Prove a fraction is a perfect square
  • · Replies 12 ·
Replies
12
Views
3K
MHB What is the required length of wire A?
  • · Replies 5 ·
Replies
5
Views
8K
MHB Trigonometric Values Exact Values
  • · Replies 7 ·
Replies
7
Views
3K
MHB Another trigonometric equality
  • · Replies 3 ·
Replies
3
Views
2K
MHB Find the Radius and Center of a Circle
  • · Replies 5 ·
Replies
5
Views
5K
MHB Pros and Cons of Using $\arcsin$ vs $\sin^{-1} x$
  • · Replies 23 ·
Replies
23
Views
27K
Undergrad Is the Shell Theorem Valid for Both Solid and Hollow Spheres?
  • · Replies 16 ·
Replies
16
Views
4K
Undergrad Trying to get a grip on a mechanics problem
  • · Replies 10 ·
Replies
10
Views
2K
Math/Science Meetups: Pursuing Recreational Interests Together
  • · Replies 2 ·
Replies
2
Views
2K
MHB Evaluating $m^4-18m^2-8m$ Given $p,\,q,\,r$
  • · Replies 2 ·
Replies
2
Views
1K
MHB Trigonometry Challenge II: Solving for $m,\,n$ and $A$
  • · Replies 2 ·
Replies
2
Views
2K
MHB Solving the Identity Challenge: $3=\sqrt{1+2...9}$
  • · Replies 2 ·
Replies
2
Views
1K
High School Fractional Exponents (How is it done?)
  • · Replies 6 ·
Replies
6
Views
2K
High School How can i show my mathematical theory?
  • · Replies 15 ·
Replies
15
Views
3K
Graduate Unifying Numerical Math and Symbolic Logic: Has Progress Been Made?
  • · Replies 4 ·
Replies
4
Views
2K
MHB Find Exactly One Triple from $n$ Objects: $\mod{6}$
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Can Non-Numerical Methods Effectively Organize Qualitative Data?
  • · Replies 3 ·
Replies
3
Views
2K
MHB Prove $\angle QBR=\angle RSQ$: Geometry Challenge
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Learning the language of math?
  • · Replies 14 ·
Replies
14
Views
23K
High School What are the best books for re-learning math?
  • · Replies 25 ·
Replies
25
Views
34K
Graduate Dimensional Consistency in Grid Defintions
  • · Replies 8 ·
Replies
8
Views
2K
MHB How do I find missing angles in trigonometry and geometry?
  • · Replies 8 ·
Replies
8
Views
3K
High School Ratios & Fractions: Understanding the Relationship
  • · Replies 1 ·
Replies
1
Views
2K
MHB Find $x$ for $\sum_{k=1}^{x}\lfloor{\sqrt[4]{k}}\rfloor=2x$
  • · Replies 1 ·
Replies
1
Views
2K
MHB Does the Polynomial $P(x)=x^3+mx^2+nx+k$ Have Three Distinct Real Roots?
  • · Replies 2 ·
Replies
2
Views
1K
MHB How to Find the Remainder of a Modulo Operation in Factorial Series?
  • · Replies 3 ·
Replies
3
Views
1K
Graduate Looking for Borwein's/Zucker's fast algorithm for the gamma function.
  • · Replies 4 ·
Replies
4
Views
2K
MHB Finding the difference of mixed measures
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Measuring distance between objects of known size in photo
  • · Replies 20 ·
Replies
20
Views
19K
Undergrad How do we define trigonometric functions?
  • · Replies 3 ·
Replies
3
Views
2K
MHB Physics: Calculate Emf, Electric Field in Magnetic Field
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Are fractals a dead-end area of maths?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad The Geometric Intuition behind the Area Formula B*H=Area
  • · Replies 7 ·
Replies
7
Views
3K
Undergrad Calculate Height of a Tree - Geometry
  • · Replies 9 ·
Replies
9
Views
17K
MHB Solving $(a+b+c)^2$ for Positive $a,b,c$
  • · Replies 4 ·
Replies
4
Views
2K
High School Every other odd number representation
  • · Replies 6 ·
Replies
6
Views
12K
MHB Proving Inequality: $a^{2a}b^{2b}c^{2c} > a^{b+c}b^{c+a}c^{a+b}$
  • · Replies 2 ·
Replies
2
Views
2K
Graduate How does one pronounce "Nijenhuis"?
  • · Replies 7 ·
Replies
7
Views
5K
MHB Challenging Applied maths question projectiles
  • · Replies 3 ·
Replies
3
Views
2K
MHB Math website for fun by one of our members
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Is Mathematical Induction Proven Correctly for $S_{k+1}:2^{k+1}>(k+1)^2$?
  • · Replies 7 ·
Replies
7
Views
2K
MHB Proving identities using demoivre's formula
  • · Replies 4 ·
Replies
4
Views
4K
MHB Can you prove the inequality challenge?
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad How can I obtain the convolution output for an input function and operator?
  • · Replies 5 ·
Replies
5
Views
2K
MHB What is the value for $a+b$ in the Polynomial Challenge VI?
  • · Replies 7 ·
Replies
7
Views
2K
MHB Inverse Functions and "Verifying"
  • · Replies 1 ·
Replies
1
Views
2K
MHB What is the Domain for the Inverse of a One-to-One Function?
  • · Replies 1 ·
Replies
1
Views
2K
High School Something funny I saw while grading
  • · Replies 15 ·
Replies
15
Views
4K
Graduate Using Mathematical Induction to Prove a Summation Formula
  • · Replies 5 ·
Replies
5
Views
2K
MHB What Do $V_i=L$ and $V_i=H$ Mean in CMOS Inverters?
  • · Replies 2 ·
Replies
2
Views
2K
MHB Find All Possible Solutions to $A$: 9 Digit Number
  • · Replies 5 ·
Replies
5
Views
1K
High School Division by 0: A Puzzle That Has Baffled Us for Years
  • · Replies 7 ·
Replies
7
Views
2K
MHB Finding the Value of $n$ in a Rhombus $DBEF$
  • · Replies 1 ·
Replies
1
Views
1K
MHB Calculating Screws Needed for 12" O/C Gutter on 100' Building
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Integer solutions for multiple variable equations
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Does this function have a name?
  • · Replies 8 ·
Replies
8
Views
2K
High School Is It Proved That All Primes End With 1,3,7,9?
  • · Replies 8 ·
Replies
8
Views
3K
Undergrad What Are the Real-World Applications of Perfect Numbers Beyond Mersenne Primes?
  • · Replies 2 ·
Replies
2
Views
3K
MHB Simultaneous Equations Challenge
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Why is RMS used for averages when considering a sine wave?
  • · Replies 4 ·
Replies
4
Views
12K
MHB Determine if you have enough information to figure question.
  • · Replies 12 ·
Replies
12
Views
3K
High School Formula for missing person's weight from team of 5
  • · Replies 22 ·
Replies
22
Views
5K
MHB What is x when c is at maximum?
  • · Replies 2 ·
Replies
2
Views
2K
MHB Is the Inequality of Series Proven with 1 to 99 and 2 to 100?
  • · Replies 2 ·
Replies
2
Views
2K
MHB Prove Inequality: $18<\sum\limits_{i=2}^{99}\dfrac 1{\sqrt i} <19$
  • · Replies 2 ·
Replies
2
Views
1K
MHB No Integer x for Which $P(x)=14$ Given Four Integer Values of $P(x)=7$
  • · Replies 2 ·
Replies
2
Views
2K
MHB System of Equations: Find Real Numbers $p,q,r,s$
  • · Replies 1 ·
Replies
1
Views
1K
MHB Can You Crack the Polynomial Challenge VII? Prove 4 Distinct Real Solutions!
  • · Replies 2 ·
Replies
2
Views
2K
High School Understanding Affine Functions: A Beginner's Guide
  • · Replies 1 ·
Replies
1
Views
2K
MHB Finding the angle opposite the R
  • · Replies 1 ·
Replies
1
Views
1K
MHB Finding the Resultant Angle for Vector Addition Using Law of Sines and Cosines
  • · Replies 4 ·
Replies
4
Views
2K
MHB Finding the Speed of an Aeroplane - Math Help Forum
  • · Replies 6 ·
Replies
6
Views
2K
MHB Help Me Solve the Golden Ratio Question
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad How Does Mathematical Induction Work?
  • · Replies 26 ·
Replies
26
Views
5K
MHB Remainder of $\dfrac {19^{81}+19^{49}+19^{25}+19^9+19}{19^3-19}$
  • · Replies 1 ·
Replies
1
Views
1K
MHB Where to Find New Math Materials from the 1960s?
  • · Replies 3 ·
Replies
3
Views
2K
MHB Explaining Dimensions of Tanagrams Without Midpoint Assumptions
  • · Replies 2 ·
Replies
2
Views
5K
MHB Determine if you have enough info to figure a side
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Can Different Types of Infinities Coexist in Mathematical Reality?
  • · Replies 27 ·
Replies
27
Views
5K
Graduate Congruence statements, with a statement of percentage
  • · Replies 2 ·
Replies
2
Views
2K
Graduate The most beautiful chain of equalities I have ever seen
  • · Replies 1 ·
Replies
1
Views
3K
High School Polynomial long division -- How does it work?
  • · Replies 14 ·
Replies
14
Views
6K
MHB How do you add and subtract measurements?
  • · Replies 17 ·
Replies
17
Views
3K
MHB Polynomial Challenge V: Real Solution Implies $p^2+q^2\ge 8$
  • · Replies 4 ·
Replies
4
Views
2K
MHB What Are the Variable Restrictions in the Equation 5/x = (10/3x) + 4?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Proof of PSF quadratic factorising
  • · Replies 1 ·
Replies
1
Views
4K
MHB Problem on finding least number
  • · Replies 3 ·
Replies
3
Views
2K
MHB What integer makes $(x-a)(x-10) +1$ factorable as $(x+b)(x+ c)$?
  • · Replies 7 ·
Replies
7
Views
2K
High School Why is the hyperbola round at the bottom?
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad Modular Arithmetic: Explained and Proven
  • · Replies 7 ·
Replies
7
Views
3K
MHB What is the area of a parallelogram without knowing the height?
  • · Replies 11 ·
Replies
11
Views
4K
Undergrad How Do I Simplify the Right Side of the Mathematical Induction Equation?
  • · Replies 9 ·
Replies
9
Views
3K
MHB Find the Max of $PC$ in $\triangle ABC$
  • · Replies 1 ·
Replies
1
Views
1K
MHB Find Sum of Diagonals of Pentagon $PQRST$
  • · Replies 5 ·
Replies
5
Views
2K