### Questions (11)

 4 Unbounded sequence with convergent subsequence 3 Help with a proof that sequence of rational numbers $a_n = \frac {a_{n-1} + \frac {2}{a_{n-1}}}{2}$ converges to an irrational, $\sqrt2$ 3 Finite but unbounded set? 2 Problem with Sequences.. 2 School Play and Ticket problem.

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 3 Proof for $\sum_{n=1}^{\infty}\frac{1}{n^2}=\frac{\pi^2}{6}$ without complexes? 1 School Play and Ticket problem. -2 Find two primitive pythagorean triples $(a,b,c)$ with $a$ odd, $b$ even and $c=a+2$

### Tags (16)

 3 real-analysis × 7 0 algebra-precalculus 3 alternative-proof 0 real-numbers 1 problem-solving × 3 0 recreational-mathematics 1 summation × 2 0 recurrence-relations 0 sequences-and-series × 6 0 irrational-numbers

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 25 The position of a ladder leaning against a wall and touching a box under it

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 Mathematics 266 rep 22 silver badges1414 bronze badges Physics 1 rep Raspberry Pi 1 rep Music: Practice & Theory 1 rep