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Tips for solving equations for a variable

score 78 · Answer 1 · 2026-04-16 14:32:36

78

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Tips for solving equations for a variable

Published on 16 Apr 2026 - 14:32

score 304 · Answer 2 · 2026-04-14 10:16:53

304

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Hint for Spivak's Calculus Problem 2-4-a

Published on 14 Apr 2026 - 10:16

score 1k · Answer 3 · 2026-04-14 18:37:43

1k

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How to prove that $\frac {\pi^2}{ \sin(\pi z)^2 } = \sum_{n=-\infty , n\neq 0 }^{n=\infty} 1/ (z-n)^2 $

Published on 14 Apr 2026 - 18:37

score 46 · Answer 4 · 2026-04-14 11:30:21

How far can you get in math by doing random problems and generalizing them in as many possible ways as you can imagine?

score 40 · Answer 5 · 2026-04-08 23:57:44

40

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Finding a function that satisfies an integral relationship

Published on 08 Apr 2026 - 23:57

score 41 · Answer 6 · 2026-04-16 08:28:20

41

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If P is the total of points on the plane. Find all functions $f:P\rightarrow P$, which fullfil some conditions.

Published on 16 Apr 2026 - 8:28

score 103 · Answer 7 · 2026-04-17 03:35:42

103

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Change of variable to show $\int_0^{\infty}\frac{dx}{1+x^2}=2\int_0^1\frac{dx}{1+x^2}$

Published on 17 Apr 2026 - 3:35

score 120 · Answer 8 · 2026-04-15 22:52:17

120

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Given positive real numbers a and b, prove that $\frac{2}{\frac{a}{x}+\frac{b}{y}} \leq ax + by, x>0, y>0$

Published on 15 Apr 2026 - 22:52

score 49 · Answer 9 · 2026-04-09 15:21:07

49

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Pre-calc algebraic method for predicting symmetry

Published on 09 Apr 2026 - 15:21

score 73 · Answer 10 · 2026-03-25 23:24:23

73

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If $x,y,z>0$, $n,m\in N$, $n\ge m$ prove:$\frac{x^n}{(y+z)^m}+\frac{y^n}{(z+x)^m}+\frac{z^n}{(x+y)^m}\ge \frac{1}{2^m}(x^{n-m}+y^{n-m}+z^{n-m})$

Published on 25 Mar 2026 - 23:24

score 347 · Answer 11 · 2026-04-16 03:30:37

347

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If $m$ and $n$ are reversed numbers (like $123$ and $321$) and $m * n = 1446921630$ , find $(m+n)$.

Published on 16 Apr 2026 - 3:30

score 442 · Answer 12 · 2026-04-21 11:25:54

442

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Find the number of positive divisors of $(2008^3 + (3 * 2008 * 2009) + 1)^2$

Published on 21 Apr 2026 - 11:25

score 50 · Answer 13 · 2026-04-13 21:13:05

50

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Solving Linear Algebraic Equation: $x+y+z=xyz$

Published on 13 Apr 2026 - 21:13

score 1.6k · Answer 14 · 2026-04-15 09:17:31

1.6k

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Find the number of integers $n$ of the form $30a0b03$ that are divisible by $13$.

Published on 15 Apr 2026 - 9:17

score 292 · Answer 15 · 2026-04-15 18:13:32

292

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What books do you recommend on graph theory?

Published on 15 Apr 2026 - 18:13

List Question

Tips for solving equations for a variable

Hint for Spivak's Calculus Problem 2-4-a

How to prove that $\frac {\pi^2}{ \sin(\pi z)^2 } = \sum_{n=-\infty , n\neq 0 }^{n=\infty} 1/ (z-n)^2 $

How far can you get in math by doing random problems and generalizing them in as many possible ways as you can imagine?

Finding a function that satisfies an integral relationship

If P is the total of points on the plane. Find all functions $f:P\rightarrow P$, which fullfil some conditions.

Change of variable to show $\int_0^{\infty}\frac{dx}{1+x^2}=2\int_0^1\frac{dx}{1+x^2}$

Given positive real numbers a and b, prove that $\frac{2}{\frac{a}{x}+\frac{b}{y}} \leq ax + by, x>0, y>0$

Pre-calc algebraic method for predicting symmetry

If $x,y,z>0$, $n,m\in N$, $n\ge m$ prove:$\frac{x^n}{(y+z)^m}+\frac{y^n}{(z+x)^m}+\frac{z^n}{(x+y)^m}\ge \frac{1}{2^m}(x^{n-m}+y^{n-m}+z^{n-m})$

If $m$ and $n$ are reversed numbers (like $123$ and $321$) and $m * n = 1446921630$ , find $(m+n)$.

Find the number of positive divisors of $(2008^3 + (3 * 2008 * 2009) + 1)^2$

Solving Linear Algebraic Equation: $x+y+z=xyz$

Find the number of integers $n$ of the form $30a0b03$ that are divisible by $13$.

What books do you recommend on graph theory?

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