List questions from problem-solving

Published on 29 Mar 2026 - 15:14

33

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Possible use of Brahmagupta-Fibonacci identity?

Published on 13 May 2020 - 13:03

41

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I need help solving an integral expression.

Published on 13 May 2020 - 19:47

130

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Perfect square of the form 1444...

Published on 13 May 2020 - 23:08

18

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Find the coefficients $c_i$ of the Taylor Series for $f \cdot g$, with f and g functions.

Published on 14 May 2020 - 0:56

45

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Trigonometric identities - without using tanx

Published on 15 May 2020 - 19:47

282

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what points make $\frac{1}{x} + \frac{1}{y} = \frac{1}{n}$ true?

Published on 17 May 2020 - 13:41

77

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Problem solving : calculate the maximum profit

Published on 17 May 2020 - 14:26

69

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Could a polygonal path on $n \times n$ lattice cross itself?

Published on 17 May 2020 - 19:06

108

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Determinant of the square matrix $A$ where $a_{i,j}=|j-i|$

Published on 18 May 2020 - 21:02

38

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Root of a function involving an integral

Published on 19 May 2020 - 10:09

37

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Find the PMF of variable using information from an other variable?

Published on 20 May 2020 - 20:27

349

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Find all polynomials $P(x)$, so that $P[F(x)] = F[P(x)],P(0)=0$ where $F$ is a given function with the property $F(x)>x$ for all $x\ge0$

Published on 30 Mar 2026 - 15:16

75

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Can Riemann integral lemma be helpful?

Published on 23 May 2020 - 4:21

472

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Two players put fill $1$ and $0$ in a $3\times 3$ matrix and compute its determinant when it is full. Can Player $0$ win if $1$ starts at the center?

Published on 25 Mar 2026 - 7:45

List Question

Interpretation of an Exercise in Probability

Possible use of Brahmagupta-Fibonacci identity?

I need help solving an integral expression.

Perfect square of the form 1444...

Find the coefficients $c_i$ of the Taylor Series for $f \cdot g$, with f and g functions.

Trigonometric identities - without using tanx

what points make $\frac{1}{x} + \frac{1}{y} = \frac{1}{n}$ true?

Problem solving : calculate the maximum profit

Could a polygonal path on $n \times n$ lattice cross itself?

Determinant of the square matrix $A$ where $a_{i,j}=|j-i|$

Root of a function involving an integral

Find the PMF of variable using information from an other variable?

Find all polynomials $P(x)$, so that $P[F(x)] = F[P(x)],P(0)=0$ where $F$ is a given function with the property $F(x)>x$ for all $x\ge0$

Can Riemann integral lemma be helpful?

Two players put fill $1$ and $0$ in a $3\times 3$ matrix and compute its determinant when it is full. Can Player $0$ win if $1$ starts at the center?

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