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Mathematics
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x100c
  • Member for 5 years
  • Last seen more than a month ago
  • Cambridge, UK
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1st year mathmo

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15
Prove that the 23 people have the same weight.
Sep 25, 2019
8
Prove that $\int \binom{n}{k}p^k(1−p)^{n−k}\,dp$ from $0$ to $1$ is $\frac{1}{n+1}$
Oct 10, 2019
6
Is $22/7$ the closest to $\pi$, among fractions of denominator at most $50$?
Jul 8, 2020
5
For continuous, monotonically-increasing $f$ with $f(0)=0$ and $f(1)=1$, prove $\sum_{k=1}^{10}f(k/10)+f^{-1}(k/10)\leq 99/10$
Oct 5, 2019
5
Number of elements of order $p$ in a (possibly infinite) group
Jan 9, 2021
4
Rational with minimal denominator between two rationals [duplicate]
Oct 20, 2019
3
prove that $(a-b)x^n+(a^2-b^2)x^{n-1}+(a^3-b^3)x^{n-2}+ \dotsm +(a^n-b^n)x+a^{n+1}-b^{n+1}=0$ has at most one real root.
Oct 6, 2019
2
Find the smallest positive integer x where 149|(x^2-69^3) [closed]
Sep 23, 2019
2
How to identify that a polynomial has factor $(x+y)^2$
Sep 26, 2019
2
Is is possible to have a third point C on this circle, so that A,B,C all fairly placed?
Oct 3, 2019