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Mathematics
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Frank
  • Member for 10 years, 11 months
  • Last seen more than 6 years ago
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All Questions Answers
Score Newest
question
22
Evaluating :$\int \frac{1}{x^{10} + x}dx$
Jul 17, 2012
question
13
Prove : $\frac{\cos(x_1) +\cos(x_2) +\cdots+\cos(x_{10})}{\sin(x_1) +\sin(x_2) +\cdots+\sin(x_{10})} \ge 3$
Aug 10, 2012
question
12
Finding all primes $p$ such that $\frac{(11^{p-1}-1)}{p}$ is a perfect square
Jul 12, 2012
question
12
Integral:$ \int^\infty_{-\infty}\frac{\ln(x^{2}+1)}{x^{2}+1}dx $
Jul 31, 2012
question
12
Proving that there exists $a_i \in \{a_1,\dots,a_k\}$ so that for any positive integer $n$ $F(n)$ is divisible by $a_i$
Jul 4, 2012
question
12
Prove that there does not exist any positive integers pair $(m, n)$ satisfying: $n(n + 1)(n + 2)(n + 3) = m{(m + 1)^2}{(m + 2)^3}{(m + 3)^4}$
Jul 10, 2012
question
12
proving :$\frac{ab}{a^2+3b^2}+\frac{cb}{b^2+3c^2}+\frac{ac}{c^2+3a^2}\le\frac{3}{4}$.
Jul 7, 2012
question
10
How to find all naturals $n$ such that $\sqrt{1 {\underbrace{4\cdots4}_{n\text{ times}}}}$ is an integer?
Jul 14, 2012
question
10
Finding all integers such that $a^2+4b^2 , 4a^2+b^2$ are both perfect squares
Aug 20, 2012
question
8
How many triangles in picture
Jun 26, 2013
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7
Free-flowing cells and those that are stuck together?
7
Intrinsic apoptosis in erythrocytes
6
Why do rod cells not recover after bleaching upon exposure to bright light?
6
Photosynthetic Pigments vs. Chloroplasts
5
Cell proliferation limit and senescence of embryonic stem cells and fibroblasts

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