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
High School Why Does Multiplication of Negative Numbers Yield Positive Results?
  • · Replies 7 ·
Replies
7
Views
5K
High School How Do You Complete the Square for x^2 + 3x + 4?
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad What is the radius of the table?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Solve Logarithm Equation 7^2x - 5*7^x - 24 =0
  • · Replies 3 ·
Replies
3
Views
3K
High School Maximizing Your Score on the SAT Math Section
  • · Replies 8 ·
Replies
8
Views
3K
High School Solving the Puzzle: Cow Rope Length in Round Meadow
  • · Replies 7 ·
Replies
7
Views
3K
High School Is 0.9~ equal to 1 in mathematical calculations?
  • · Replies 12 ·
Replies
12
Views
3K
Undergrad How do I find the values of A, B, and C in a polynomial with the given factors?
  • · Replies 15 ·
Replies
15
Views
3K
Graduate William Lowell Putnam Competition
  • · Replies 6 ·
Replies
6
Views
3K
High School What is the required speed to average 60 MPH for a car trip with varying speeds?
  • · Replies 7 ·
Replies
7
Views
6K
High School What is the purpose of imaginary numbers and how do they work?
  • · Replies 60 ·
3
Replies
60
Views
8K
New Number System Allows Pi to be Exact
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad Slicing dice and cutting corners
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad What is the curious relationship between exponential and logarithmic functions?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Should You Share Your Revolutionary Science Theory Online?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Math courses for next semester.
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad Numbers with Non-Decreasing Digits
  • · Replies 32 ·
2
Replies
32
Views
8K
Graduate Lucas-Lehmer Test for Mersenne Primes
  • · Replies 6 ·
Replies
6
Views
4K
High School How Are Logarithms Applied in Physics?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad How can I simplify this equation and see the connection between #5 and #7?
  • · Replies 7 ·
Replies
7
Views
2K
High School Mastering Math Identities: Clear and Comprehensive Guide for AS Level Students
  • · Replies 24 ·
Replies
24
Views
4K
Undergrad Solving for f in f(f(x)) = 2x^2 - 1
  • · Replies 18 ·
Replies
18
Views
5K
High School REALLY NEED HELP Solving for X with radicals/square roots
  • · Replies 10 ·
Replies
10
Views
4K
High School The Thousand Locker Problem: How Many Remain Open?
  • · Replies 12 ·
Replies
12
Views
4K
High School Solve the Mystery: Identify Light Bulb Switches
  • · Replies 14 ·
Replies
14
Views
5K
What is a problem that would have been hard to solve without a slide rule?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Solve Fraction Expansion: Find A & B
  • · Replies 1 ·
Replies
1
Views
2K
High School How can I stay motivated to learn math?
  • · Replies 16 ·
Replies
16
Views
6K
Undergrad Proving Area Equality of Parallelograms ABCD & AXYZ
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad All n-variable combinations can exist within a word
  • · Replies 21 ·
Replies
21
Views
4K
Undergrad Help Factorise an equation with fraction index?
  • · Replies 2 ·
Replies
2
Views
6K
Undergrad What classes did you mathematics majors take?
  • · Replies 32 ·
2
Replies
32
Views
17K
High School Proof of 10^(3^4) = 100 Googol Googols
  • · Replies 5 ·
Replies
5
Views
2K
High School I need some help with these two calculator trig problems
  • · Replies 8 ·
Replies
8
Views
3K
Unsung Heroes: Recognizing the Impact of Mathematics on Society
  • · Replies 21 ·
Replies
21
Views
7K
High School Geometry and Discrete Math Links
  • · Replies 6 ·
Replies
6
Views
3K
Undergrad What is the height of the chimney?
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Theory of Accuracy: Perfect Circles & Real Life
  • · Replies 8 ·
Replies
8
Views
5K
High School How Do Changes in a, b, and c Values Affect the Graph of a Quadratic Equation?
  • · Replies 6 ·
Replies
6
Views
11K
Undergrad Equation of the line joining A(-1, 9) to B(6, 12)
  • · Replies 2 ·
Replies
2
Views
2K
High School What resources does NIU offer for mathematics?
  • · Replies 3 ·
Replies
3
Views
3K
High School How Can I Stop Making Silly Mistakes in Math Tests?
  • · Replies 23 ·
Replies
23
Views
5K
Undergrad How many pairs of positive integer a, b
  • · Replies 12 ·
Replies
12
Views
3K
Undergrad Help with solving a polynomial
  • · Replies 5 ·
Replies
5
Views
2K
High School Why Can't I Solve These Seemingly Simple Math Problems?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Rotating a Vector [x0,y0,z0] in an XYZ Frame
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Solve Polynomial Equation for Real a
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Find all positive integers c such that it is possible to write c = a/b + b/a
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Solve X-(S+P-C)E^RT+D*E^RT=0 and Isolate C
  • · Replies 11 ·
Replies
11
Views
2K
Do You Get Judged For Being a Math Major?
  • · Replies 27 ·
Replies
27
Views
7K
High School Calculate what number x needs to be, to make y 0 ?
  • · Replies 15 ·
Replies
15
Views
3K
Undergrad Solve x^2+7x>6+2x^3: Tips & Solutions
  • · Replies 5 ·
Replies
5
Views
2K
High School Independent study on Logarithms
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad What is the significance of the repeating pattern in a circle of numbers?
  • · Replies 2 ·
Replies
2
Views
2K
High School Find P: P corresponds to prime digits
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Solving Inequality Problem: (|a|+|b|≥2(|c|+|d|))
  • · Replies 2 ·
Replies
2
Views
2K
The Purest form of Abstract thought
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Solving for x: Unraveling the Rules of O(x)
  • · Replies 6 ·
Replies
6
Views
2K
High School Solving (UN)^2=DEUX Math Problem
  • · Replies 13 ·
Replies
13
Views
2K
High School Solving the Math Teacher Dinner Puzzle: Find the Date!
  • · Replies 17 ·
Replies
17
Views
3K
High School Can You Solve the Matchstick Puzzle to Form a Tetrahedron?
  • · Replies 3 ·
Replies
3
Views
4K
Undergrad Proof that (2n)/[n(n+1)] is natural for natural n
  • · Replies 13 ·
Replies
13
Views
21K
High School Solving m - (x-n)^2: Get Help Here
  • · Replies 16 ·
Replies
16
Views
4K
Graduate What is the best calculator for a mathematics student?
  • · Replies 21 ·
Replies
21
Views
5K
High School Can You Crack the 14-Digit Number Puzzle?
  • · Replies 3 ·
Replies
3
Views
3K
High School Building a 3-Sided Pyramid with 1,050,000 Marbles
  • · Replies 1 ·
Replies
1
Views
6K
High School Degrees of a Circle: How Much & Why 360
  • · Replies 3 ·
Replies
3
Views
5K
High School What is the length of the red line in this geometry problem?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Justify Definition: Proofs - Meaning & Example
  • · Replies 4 ·
Replies
4
Views
3K
High School Math Symbol "Enigma" - Does it Represent "There Exists"?
  • · Replies 3 ·
Replies
3
Views
8K
High School Is there a real number whose square is exactly 8?
  • · Replies 11 ·
Replies
11
Views
2K
High School Labeling Boxes: Apples, Oranges, or Both?
  • · Replies 6 ·
Replies
6
Views
4K
High School Why Did My Math Answer Get Marked Incorrect?
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad Unraveling Auto Focus: Cameras and Math
  • · Replies 6 ·
Replies
6
Views
4K
High School Does a median in a triangle create two congruent triangles?
  • · Replies 3 ·
Replies
3
Views
3K
Troubleshooting: What's Wrong Here?
  • · Replies 10 ·
Replies
10
Views
3K
Undergrad Boy Outsmarts Terrible and Awful Sons!
  • · Replies 7 ·
Replies
7
Views
3K
Math Test Question: Guess the Answer
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad How do I refute or prove this?
  • · Replies 4 ·
Replies
4
Views
2K
High School How do you solve for cos2x = 2 cosx sinx?
  • · Replies 32 ·
2
Replies
32
Views
11K
Graduate Hiegher dimensional Mathematics.
  • · Replies 1 ·
Replies
1
Views
2K
High School Solving Non-Linear Systems of Equations: A Simple Method
  • · Replies 3 ·
Replies
3
Views
2K
Why is the Irish Lottery considered to have better odds than other lotteries?
  • · Replies 15 ·
Replies
15
Views
4K
Undergrad Composite Functions: Inverse of f o g?
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Absolute quadratic inequalities.
  • · Replies 4 ·
Replies
4
Views
6K
High School Trig Proofs: Websites for Basic Identities
  • · Replies 3 ·
Replies
3
Views
8K
High School Finding Intersections: Subsitution Method Help
  • · Replies 4 ·
Replies
4
Views
2K
High School Can I Teach Myself Trig Just by Reading a Textbook?
  • · Replies 24 ·
Replies
24
Views
23K
High School Cracking Dr. Ray's Secret Code: Can You Figure it Out?
  • · Replies 37 ·
2
Replies
37
Views
7K
High School The Secrets of Geometry: A Comprehensive Overview
  • · Replies 10 ·
Replies
10
Views
2K
High School Understanding Rotations on a Polar Grid | Geometry Explained
  • · Replies 2 ·
Replies
2
Views
2K
High School When i have tan2x = 1 i get two angles
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad What math courses should I take next semester?
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Are Proportional Sides Enough to Prove Equal Angles in Similar Triangles?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Square of n factorial is greater than n to the power n
  • · Replies 14 ·
Replies
14
Views
20K
Graduate Prove that: e^pi > pi^e, without using a calculator
  • · Replies 1 ·
Replies
1
Views
4K
High School Convert seconds to nanoseconds on a calculator?
  • · Replies 17 ·
Replies
17
Views
6K
High School How can I use 4, 4, and 4 to result in the number 31?
  • · Replies 13 ·
Replies
13
Views
2K
Graduate How Did Viete Solve Roomen's Problem in 1595?
  • · Replies 3 ·
Replies
3
Views
3K
High School Understanding the Concept of max{x,y} in Discreet Mathematics
  • · Replies 7 ·
Replies
7
Views
4K