Mathematics
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134 Proof that every number ≥ $8$ can be represented by a sum of fives and threes. Mar 8 '15
21 Calculate $\sum_{k=1}^n \frac 1 {(k+1)(k+2)}$ Jul 7 '14
10 $1+1=0$ What am I doing wrong???! Apr 8 '15
9 How do you solve $10^{-3/20}$ as $1/2^{1/2}$? Mar 19 '15
9 Does there exist a continuous function $f$ such that $f(x)+f(x^2)=x$ for $x\in[0,1]$? Feb 15
8 Is there any positive function $f$ such that $f(x)f(y)\leq |x-y|$ for every $x$ rational and $y$ irrational? [duplicate] Aug 17 '17
8 Showing divergence for $\sum^\infty_{n=1} \bigl(1-\cos (1/\sqrt n)\bigr)$ Mar 3 '15
8 The sum of the cubes of the reciprocal values of the roots of the equation $x^2+ax+1=0$ is? May 27 '15
6 prove that $\sqrt{3} + \sqrt{5}$ is an irrational number Feb 27 '15
6 Product of compact subsets of a topological group is compact Jul 15 '14
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