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 Expressing First 1000 Positive Integers as Floor Functions
  • · Replies 3 ·
Replies
3
Views
2K
Who are the Top Math/Physics Content Creators on YouTube and Beyond?
  • · Replies 9 ·
Replies
9
Views
9K
MHB Heptagon Challenge: Proving $\dfrac{1}{2}<\dfrac{S_Q+S_R}{S_P}<2-\sqrt{2}$
  • · Replies 1 ·
Replies
1
Views
945
MHB Prove ABC is an equilateral triangle
  • · Replies 1 ·
Replies
1
Views
1K
MHB What are the possible integers for which a given expression is an integer?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Fundamentals of Astrodynamics: Dot Product Question
  • · Replies 20 ·
Replies
20
Views
2K
MHB How to Solve an Equation with Square Roots?
  • · Replies 5 ·
Replies
5
Views
2K
MHB Solving Integer Equations with $a$ and $b$
  • · Replies 4 ·
Replies
4
Views
1K
High School Possible factor(s) of 2^(12n+9)+1
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Finding multinomial coefficients by evaluation?
  • · Replies 13 ·
Replies
13
Views
2K
Undergrad Product of distances from foci to any tangent of an ellipse
  • · Replies 2 ·
Replies
2
Views
2K
MHB Is 7 an irrational number in the set of integers?
  • · Replies 5 ·
Replies
5
Views
3K
MHB Find the area of the red region
  • · Replies 2 ·
Replies
2
Views
1K
MHB Find (x₁²+1)(x₂²+1)(x₃²+1)(x₄²+1)
  • · Replies 2 ·
Replies
2
Views
1K
MHB Parallelogram ABCD: Finding AC from PB & PD
  • · Replies 1 ·
Replies
1
Views
1K
MHB Max Value of $b$ for Real Roots of $f(x)$ and $g(x)$
  • · Replies 2 ·
Replies
2
Views
1K
MHB Equation of the form x+a=√(bx+c)
  • · Replies 7 ·
Replies
7
Views
1K
Undergrad Does this make a cubic out of a quadratic system?
  • · Replies 9 ·
Replies
9
Views
2K
MHB Polynomial Challenge: Show Real Roots >1 Exist
  • · Replies 1 ·
Replies
1
Views
1K
MHB Solving System of Equalities: x^2-y\sqrt xy & y^2-x\sqrt xy =3
  • · Replies 2 ·
Replies
2
Views
1K
MHB Geometry Challenge: Prove $\angle ADE=\angle BDC$ in Convex Quadrilateral $ADBE$
  • · Replies 3 ·
Replies
3
Views
1K
MHB Topic of presentation: Elementary Geometry vs Fibonacci & its sequences
  • · Replies 10 ·
Replies
10
Views
2K
MHB Lengths of the sides of quadrilateral
  • · Replies 1 ·
Replies
1
Views
1K
MHB Find the area of the shaded region
  • · Replies 2 ·
Replies
2
Views
1K
High School Why Do We Draw Dimensionless Unit Vectors in Diagrams?
  • · Replies 16 ·
Replies
16
Views
4K
MHB Prove $\frac{1}{3}\le \frac{u}{v} \le \frac{1}{2}$ with Triangle Sides
  • · Replies 4 ·
Replies
4
Views
1K
MHB Solve System of Inequalities: 2x+3y-4, 3x-4y+5
  • · Replies 8 ·
Replies
8
Views
2K
MHB Solve System of Equalities: x^2+xy+y^2, x^2+xz+z^2, y^2+yz+z^2
  • · Replies 7 ·
Replies
7
Views
2K
MHB Is $f(x) = xf(1)$ the only solution to the given functional equation?
  • · Replies 3 ·
Replies
3
Views
2K
MHB System of Equations: Find Triples $(x,y,z)$
  • · Replies 1 ·
Replies
1
Views
1K
High School Why do shapes with the same area have different perimeters?
  • · Replies 21 ·
Replies
21
Views
5K
Undergrad Who would win a perfect game of chess?
  • · Replies 195 ·
7
Replies
195
Views
24K
MHB What are the angles of an isosceles triangle with a specific ratio?
  • · Replies 2 ·
Replies
2
Views
1K
High School Does it make sense to say that something is almost infinite?
  • · Replies 7 ·
Replies
7
Views
2K
High School Looking for examples of unexpected applications of math concepts
  • · Replies 15 ·
Replies
15
Views
2K
High School Area of a Circle in an Electron's Hydrogen Atom
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Simple, almost "intuitive" conjecture, hard or impossible to solve?
  • · Replies 5 ·
Replies
5
Views
2K
MHB Can You Prove This Inequality Challenge?
  • · Replies 2 ·
Replies
2
Views
1K
MHB Find the amount of sand in each bag
  • · Replies 1 ·
Replies
1
Views
1K
MHB Finding $b(a+c)$ for Real Roots of $\sqrt{2014}x^3-4029x^2+2=0$
  • · Replies 1 ·
Replies
1
Views
2K
MHB Find the diameter of one circle
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad What is meant by "convergent just preceding ##\frac{a}{b}##" ?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Area of a cylinder enclosing an ellipsoid
  • · Replies 12 ·
Replies
12
Views
1K
Undergrad Find Angles in Right Angle Triangles
  • · Replies 4 ·
Replies
4
Views
1K
MHB Find the total number of red and blue beads
  • · Replies 5 ·
Replies
5
Views
2K
MHB How does temperature affect the length of a steel measuring tape?
  • · Replies 1 ·
Replies
1
Views
3K
MHB Inequality Challenge: Prove $x$ for $x>0$
  • · Replies 1 ·
Replies
1
Views
1K
MHB What is the value of (a+b)^3+(b+c)^3+(c+a)^3 for the roots of 8x^3+1001x+2008=0?
  • · Replies 2 ·
Replies
2
Views
1K
MHB Prove $\pi^e > 5^{1.9}$ Without Calculator
  • · Replies 2 ·
Replies
2
Views
1K
MHB Couple of hard trig questions....
  • · Replies 1 ·
Replies
1
Views
2K
MHB Exponential functions (calculator exercise)
  • · Replies 1 ·
Replies
1
Views
2K
MHB Are Critical Points and Roots Interchangeable in Math?
  • · Replies 3 ·
Replies
3
Views
3K
MHB Evaluate the constant in polynomial function
  • · Replies 7 ·
Replies
7
Views
2K
MHB Can You Solve This Tricky Trigonometric Floor Function Equation?
  • · Replies 4 ·
Replies
4
Views
1K
MHB Find the last digit of a series
  • · Replies 2 ·
Replies
2
Views
1K
MHB Engineering Mechanics: car speeding up
  • · Replies 2 ·
Replies
2
Views
4K
MHB Engineering Mechanics: depth of crater
  • · Replies 1 ·
Replies
1
Views
2K
MHB Algebra word problem solve for x
  • · Replies 4 ·
Replies
4
Views
2K
MHB Factorials and Exponent Challenge
  • · Replies 2 ·
Replies
2
Views
1K
MHB Factorize 6(x^5+y^5+z^5)-5(x^2+y^2+z^2)(x^3+y^3+z^3)
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Hamilton path and circuit rounded path problem
  • · Replies 10 ·
Replies
10
Views
3K
MHB Man on ladder wishes to avoid the ladder slipping
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Need help developing a movement function for motor motion
  • · Replies 3 ·
Replies
3
Views
986
MHB Solving a Third-Degree Polynomial with Real Coefficients
  • · Replies 1 ·
Replies
1
Views
2K
MHB Proving Equality of Angles in an Acute Triangle
  • · Replies 4 ·
Replies
4
Views
1K
High School What Are the Sign Rules for Second Degree Functions?
  • · Replies 6 ·
Replies
6
Views
2K
MHB Find Final Diameter of 30m Aluminum Bar (172MPa)
  • · Replies 1 ·
Replies
1
Views
1K
MHB Find Solutions to a+b+c+d=4, a^2+b^2+c^2+d^2=6, a^3+b^3+c^3+d^3=94/9 in [0,2]
  • · Replies 2 ·
Replies
2
Views
1K
MHB Find real solutions to a system
  • · Replies 6 ·
Replies
6
Views
1K
MHB Equation of Line in Second Quadrant with Area 4 and Differing Intercepts
  • · Replies 3 ·
Replies
3
Views
2K
MHB Finding the Length of a Dividing Line in a Trapezoid
  • · Replies 5 ·
Replies
5
Views
2K
MHB Find the average force required to hold the gun in position
  • · Replies 5 ·
Replies
5
Views
2K
High School Mathematical Name of this Space
  • · Replies 8 ·
Replies
8
Views
2K
MHB Quadratic equations intersaction point is minimum instead of roots
  • · Replies 2 ·
Replies
2
Views
2K
High School Algorithm for checking if a set of digits are all distinct
  • · Replies 25 ·
Replies
25
Views
2K
Graduate Symbol ##\supset## Meaning in Eqs. 3.1 & 3.2
  • · Replies 2 ·
Replies
2
Views
1K
MHB Find Integer Solutions for (A+3B)(5B+7C)(9C+11A)=1357911
  • · Replies 3 ·
Replies
3
Views
1K
High School How to dilute 91% alcohol to 70%?
  • · Replies 13 ·
Replies
13
Views
10K
MHB Relationship between inner and outer radius of a two concentric circles
  • · Replies 2 ·
Replies
2
Views
2K
MHB Find the Bearing from A to C & Angle B: Solve Here
  • · Replies 3 ·
Replies
3
Views
2K
High School Explore Nullarbor Plains: Walking North to Find the Track
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Solving this system of equations in different ways
  • · Replies 5 ·
Replies
5
Views
1K
MHB Communication in mathematics and physics
  • · Replies 1 ·
Replies
1
Views
2K
MHB A quite delicious inequality problem
  • · Replies 1 ·
Replies
1
Views
812
MHB Parentheses and brackets: Evaluate 2³[1/4+4(36÷12)]
  • · Replies 6 ·
Replies
6
Views
2K
MHB In how many ways can Ben paint his apartment?
  • · Replies 4 ·
Replies
4
Views
1K
MHB What is the value of $(a+c)(b+c)(a-d)(b-d)$ given specific roots?
  • · Replies 6 ·
Replies
6
Views
1K
High School What does it mean to "do mathematics"?
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad Is it possible to calculate this geometrical relationship between circles?
  • · Replies 7 ·
Replies
7
Views
2K
MHB Find the points of intersection of a line and a circle
  • · Replies 2 ·
Replies
2
Views
2K
MHB Can you prove that Triangle $ABC$ is Isosceles?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad How to distinguish r and gamma, w and omega, v and nu?
  • · Replies 10 ·
Replies
10
Views
2K
MHB Understanding Cubic Equation Formula for Polynomials of Degree Three
  • · Replies 9 ·
Replies
9
Views
4K
MHB Acute angle of right triangles
  • · Replies 4 ·
Replies
4
Views
2K
MHB Is the Inequality 1/(log₂π)+1/(log₅π)>2 True? A Scientific Investigation
  • · Replies 1 ·
Replies
1
Views
987
MHB Prove $|q|>64$: Roots of $x^{12}-pqx+p^2=0$
  • · Replies 1 ·
Replies
1
Views
1K
MHB Condition for A Quartic Equation to have a Real Root
  • · Replies 2 ·
Replies
2
Views
1K
MHB Testing Ackbach: Verifying Posting as a Registered User
  • · Replies 4 ·
Replies
4
Views
1K
MHB What are the best resources for solving trigonometric equations and identities?
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad MathCan Numerical Observations Lead to a Simpler Proof of Fermat's Last Theorem?
  • · Replies 20 ·
Replies
20
Views
4K