Mathematics
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puru
  • Member for 8 years, 2 months
  • Last seen more than 1 year ago
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All Questions Answers
Score Newest
answer
52
How can I evaluate $\sum_{n=0}^\infty(n+1)x^n$?
Jun 4, 2014
answer
8
How to solve this congruence $17x \equiv 1 \pmod{23}$?
Jun 21, 2014
answer
6
Explain the Birthday Paradox
Jun 18, 2014
answer
4
A Sine-Cosine Integral $\int_{0}^{\frac{\pi}{2}} \frac{ \sin(kx) \ +\ \cos(kx)}{\sin x \ +\ \cos x} \ dx$
Jun 19, 2014
question
4
Practical examples of same mean and different variance
Oct 31, 2014
answer
4
Why is $\sin 150^o\times\sin 20^o=\sin 80^o\times\sin 10^o$
Jun 25, 2014
answer
3
Let $Z=xy$ and $x+2y=1$ and $x,y \ge 0$. Then Max $Z=?$
Jun 28, 2014
answer
3
deriving $y=\sqrt{x+\sqrt{x+\sqrt{x}}\cdots} $
Jul 11, 2014
answer
2
Trigonometry - simplifying a given equation
Jul 10, 2014
answer
2
Solving $x-\sqrt{(x^2-36)} = {(x-6)^2\over 2x+12}$.
Jun 18, 2014

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