Mathematics
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A.D
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All Questions Answers
Score Newest
answer
199
Prove $\operatorname{rank}A^TA=\operatorname{rank}A$ for any $A\in M_{m \times n}$
Apr 3, 2013
question
18
Find $\lim\limits_{n \to \infty}\left(1-\frac{1}{2^2}\right)\left(1-\frac{1}{3^2}\right)\cdots\left(1-\frac{1}{n^2}\right)$ [duplicate]
Jan 25, 2013
answer
16
How can I prove $2\sin x+\tan x \geq 3x$?
Dec 23, 2012
question
11
Show that $\frac{x}{1-x}\cdot\frac{y}{1-y}\cdot\frac{z}{1-z} \ge 8$.
Jun 19, 2013
answer
10
Conditional probabilities from a joint density function
Mar 24, 2013
question
10
Show that $2^n>1+n\sqrt{2^{n-1}}$
Jun 19, 2013
question
10
Prove that $\log _5 7 < \sqrt 2.$
Jun 18, 2013
question
9
Prove that $\frac{b^2+c^2}{b+c}+\frac{c^2+a^2}{c+a}+\frac{a^2+b^2}{a+b} \ge a+b+c$
Jun 19, 2013
question
8
Find remainder of $F_n$ when divided by $5$
Mar 28, 2013
answer
7
Why is $\sum_{m=0}^k \frac{k^2+k}{2} = \frac{(k^2+k)(k+1)}{2}$?
Jan 14, 2015
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13
Can Neyman-Pearson lemma apply to the case when simple null and alternative don't belong to the same family of distributions?
12
Notation for two expressions with the same distribution
11
Independence of Sample mean and Sample range of Normal Distribution
9
Probability: Calculating a multiple integral
8
Evaluate $\lim_{n \to \infty} \sum_{j=0}^{n}{{j+n-1} \choose j}\frac{1}{2^{j+n}}$

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