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
Undergrad De Moivres formula for multiple angles. Where does the sinus go?
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Working on the P vs. NP Problem for a Shot at $1,000,000?
  • · Replies 21 ·
Replies
21
Views
5K
High School Apparentlyx[SUP]2[/SUP]/y + yis the same
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Cryptography/CompSecurity Question
  • · Replies 1 ·
Replies
1
Views
2K
High School Should pi be replaced with tau in mathematics?
  • · Replies 55 ·
2
Replies
55
Views
14K
Graduate Prime factorization for large numbers
  • · Replies 6 ·
Replies
6
Views
12K
Undergrad Finding the Sine of an Acute Angle Using the Pythagorean Theorem
  • · Replies 4 ·
Replies
4
Views
13K
Undergrad Is there a better calculus textbook for self-study than Courant's?
  • · Replies 18 ·
Replies
18
Views
15K
Undergrad How was substitution chosen in ellipse equation derivation?
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad Real-World Applications of Conic Sections: How Can They Benefit Us?
  • · Replies 2 ·
Replies
2
Views
4K
This is not a homework question. It is a question that I can't figure out
  • · Replies 2 ·
Replies
2
Views
2K
High School Which Statement is True in a Series of False Statements?
  • · Replies 2 ·
Replies
2
Views
3K
High School What is the formula for isolating b in the law of sines?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Personal Maths Question Trying To Solve
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Solve the Maximum Months for 30 Card Players in 6 Groups of 5 | Maths Help
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Is sqrt(x) a function if it includes both positive and negative solutions?
  • · Replies 5 ·
Replies
5
Views
15K
Undergrad Finding Point M on Triangle ABC's Circumcircle
  • · Replies 6 ·
Replies
6
Views
3K
Undergrad How Does Rotating the x-Axis Create a New Polynomial Graph?
  • · Replies 2 ·
Replies
2
Views
2K
High School Why Does (-1)^2 = 1 in Spivak's Calculus Book?
  • · Replies 23 ·
Replies
23
Views
5K
High School What is the odd inequality sign I saw in my lecture notes?
  • · Replies 5 ·
Replies
5
Views
3K
Undergrad Rearranging terms in Trig equation
  • · Replies 5 ·
Replies
5
Views
4K
High School Either my math book is wrong or my calculator doesn't work
  • · Replies 6 ·
Replies
6
Views
5K
Undergrad Prove x13+x23+x33+x43 ≥ x1+x2+x3+x4 with x1x2x3x4=1
  • · Replies 11 ·
Replies
11
Views
3K
Graduate Solving an equation involving factorials
  • · Replies 4 ·
Replies
4
Views
5K
Graduate Simple proof of Fermat's theorem?
  • · Replies 10 ·
Replies
10
Views
4K
Graduate Is proving conjectures such a big deal?
  • · Replies 3 ·
Replies
3
Views
3K
High School Learning AlgebraII, Any Advice?
  • · Replies 7 ·
Replies
7
Views
3K
Graduate What pedagogical motivation is there for the existence/approximation of pi?
  • · Replies 9 ·
Replies
9
Views
3K
Undergrad How to find the number that's evenly divisible by a set of numbers from 1 to n?
  • · Replies 2 ·
Replies
2
Views
4K
Undergrad Identities for atan(a+b) or atan(a*b)
  • · Replies 2 ·
Replies
2
Views
5K
Where can I find fellow math enthusiasts for online correspondence?
  • · Replies 11 ·
Replies
11
Views
5K
Graduate What is the Sum of the Reciprocals of Variables in Solving Cubic Root Equations?
  • · Replies 1 ·
Replies
1
Views
2K
High School How to calculate any 8 digits, to two 4 digit combinations?
  • · Replies 3 ·
Replies
3
Views
5K
High School What are some good reference books to complement Calculus and Vectors course?
  • · Replies 3 ·
Replies
3
Views
16K
Undergrad How can I generalize the squaring of any sum of variables?
  • · Replies 7 ·
Replies
7
Views
5K
Undergrad How can I find the range of the function ?
  • · Replies 3 ·
Replies
3
Views
4K
Undergrad Simplify Equation - Can You Help?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Prove the following (how to tell if a number is divisible by 3)
  • · Replies 5 ·
Replies
5
Views
3K
High School In Triangle EFG find the value of f, if e=7.3cm g=8.7cm and angle E= 73 degrees
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad What's wrong with this function
  • · Replies 12 ·
Replies
12
Views
3K
Undergrad Problem in finding quad. eqn. from the roots
  • · Replies 2 ·
Replies
2
Views
2K
High School Math stuff that hasn't been proven
  • · Replies 86 ·
3
Replies
86
Views
15K
Undergrad Sum of Diagonals in 1001x1001 Spiral
  • · Replies 6 ·
Replies
6
Views
9K
Who Are Today's Top 5 Mathematicians Destined for Greatness?
  • · Replies 2 ·
Replies
2
Views
3K
High School Applying for Tutoring Position: Retaking Algebra Test
  • · Replies 16 ·
Replies
16
Views
4K
Graduate The Mathematical Method in Economics
  • · Replies 23 ·
Replies
23
Views
10K
Graduate Nice math proof arctan(x)+arctan(1/x)=sign(x)pi/2
  • · Replies 9 ·
Replies
9
Views
14K
High School How To Plot A Curve With Given Three Points?
  • · Replies 7 ·
Replies
7
Views
26K
High School Find a point on a line given, distance from startpoint
  • · Replies 1 ·
Replies
1
Views
5K
Graduate What are some recommended textbooks for learning non-analytic curve fitting?
  • · Replies 4 ·
Replies
4
Views
3K
High School Proof of Multiplying by Fraction = Dividing by Inverse
  • · Replies 2 ·
Replies
2
Views
5K
High School Multiplication and Division of Decimals
  • · Replies 6 ·
Replies
6
Views
4K
Graduate What Is the Smallest N That Cannot Be Eliminated Using Modular Arithmetic?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad What goes into a capable math mind?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Examples of modern mathematics in everyday life
  • · Replies 5 ·
Replies
5
Views
9K
Single most important object in mathematics?
  • · Replies 34 ·
2
Replies
34
Views
7K
Undergrad Anyone wanna work through some books together?
  • · Replies 13 ·
Replies
13
Views
3K
Graduate Help with understanding kalman filter
  • · Replies 6 ·
Replies
6
Views
6K
Undergrad Why the roots of Eq. x^2 + a*x + b = 0
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Generalization of Hyperoperations / fractional operations
  • · Replies 5 ·
Replies
5
Views
7K
Graduate Most elegant proof of Arctan(x) + Arctan(1/x)
  • · Replies 23 ·
Replies
23
Views
60K
High School Transforming Functions: From f(x+1) to f(x)
  • · Replies 34 ·
2
Replies
34
Views
6K
Graduate Preparing and Submitting Your Proof to Journals: Tips and Guidelines
  • · Replies 15 ·
Replies
15
Views
5K
Undergrad Puzzle: a cube with Latin squares
  • · Replies 8 ·
Replies
8
Views
3K
Undergrad Trouble with Confusing Notations in Mathematics?
  • · Replies 30 ·
2
Replies
30
Views
7K
I'd rather do your work than mine
  • · Replies 18 ·
Replies
18
Views
3K
High School Can You Solve These Root-Based Simultaneous Equations Without Guessing?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Are there many simple math solutions left?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate What is the value of ∞/2 in extended real numbers?
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Optimization Solver - BFGS method with bound constraints
  • · Replies 12 ·
Replies
12
Views
13K
Graduate A very large number that has all of these qualities?
  • · Replies 46 ·
2
Replies
46
Views
11K
Undergrad Prove AM-GM Inequality: a,b,c ≥ 0 and a+b+c=3
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Angle bisectors of a quadrilateral
  • · Replies 3 ·
Replies
3
Views
4K
Undergrad Algebra solution containing trig?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad How Do I Solve This 3D Trigonometry Problem?
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad The square root yields only one value ?
  • · Replies 24 ·
Replies
24
Views
7K
Undergrad How to mimic 4/pi*ArcTan(x)+1 without trig
  • · Replies 5 ·
Replies
5
Views
3K
Undergrad Trilinear and triquadratic functions
  • · Replies 1 ·
Replies
1
Views
5K
Undergrad What Are Innovative Math Topics for an Intel Project in Economics?
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad Inconsistent language of the percentage system
  • · Replies 18 ·
Replies
18
Views
4K
High School How Can You Derive the Formula for the Sum of the First n Integers?
  • · Replies 5 ·
Replies
5
Views
5K
Undergrad What is the study of higher dimensions?
  • · Replies 3 ·
Replies
3
Views
6K
High School Solving Equations with Basic Math Notation
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Geometrical problem related to thin film interference
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Multiplying equations - spiral coil heat transfer
  • · Replies 3 ·
Replies
3
Views
3K
High School An interesting mathematical property
  • · Replies 5 ·
Replies
5
Views
3K
High School What is the relationship between Mathematics and Physics?
  • · Replies 35 ·
2
Replies
35
Views
32K
High School Closed Form Solution | Definition & Meaning
  • · Replies 7 ·
Replies
7
Views
14K
Graduate Applying Lagrange Multipliers to Optimization with Binary Variables
  • · Replies 1 ·
Replies
1
Views
2K
High School Why do people refer ln(x) as log(x) ?
  • · Replies 25 ·
Replies
25
Views
40K
Graduate Riemann Zeta function of even numbers
  • · Replies 2 ·
Replies
2
Views
3K
High School Calculate the difference between two gradients
  • · Replies 1 ·
Replies
1
Views
4K
Undergrad How many geese in 2,4,10 years if
  • · Replies 6 ·
Replies
6
Views
3K
High School Effective Tips for Self-Studying Math: How to Master the Subject on Your Own
  • · Replies 3 ·
Replies
3
Views
4K
Graduate Convergent sum has possible error that never occurs
  • · Replies 12 ·
Replies
12
Views
2K
High School How Can I Master Statistics for Psychology Without a Math Background?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate How do I see this? Simplification
  • · Replies 2 ·
Replies
2
Views
2K
High School Any gentle introduction of Fibonacci chain?
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad What is high level mathematics really like?
  • · Replies 19 ·
Replies
19
Views
35K
Undergrad Partial sum of harmonic series as an improper fraction
  • · Replies 3 ·
Replies
3
Views
6K