Mathematics
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user84413
  • Member for 10 years, 3 months
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I teach calculus in CA.

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All Questions Answers
Score Newest
answer
30
Proof of continuity of Thomae Function at irrationals.
Oct 17, 2013
answer
20
Does having a minimum along all lines imply that the function has a minimum?
Jul 3, 2014
question
19
Showing that $Q_n=D_n+D_{n-1}$
Jul 24, 2013
answer
19
Prove that $\frac{a_1^2}{a_1+b_1}+\cdots+\frac{a_n^2}{a_n+b_n} \geq \frac{1}{2}(a_1+\cdots+a_n).$
Dec 29, 2015
answer
19
Prove $\sum\limits_{i=0}^n\binom{i+k-1}{k-1}=\binom{n+k}{k}$ (a.k.a. Hockey-Stick Identity)
Jun 14, 2014
answer
18
Prove If LCM(a,b) = c and a|k and b|k then c|k.
Oct 8, 2014
answer
16
Derivation of derangement with inclusion-exclusion
Sep 12, 2014
answer
16
$\sum_{k=0}^{n/2} {n\choose{2k}}=\sum_{k=1}^{n/2} {n\choose{2k-1}}$, Combinatorial Proof:
Aug 3, 2013
answer
16
How to find a basis of an image of a linear transformation?
Aug 12, 2014
answer
14
Prove $|P(0)|\leq 2n+1$
Feb 7, 2016

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