doniyor

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math is something that opens the door of the Incredibles

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79 Questions

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13	$\infty - \infty = 0$ ?
10	prove $\binom{n}{k}\frac{1}{n^k}\leq\frac{1}{k!}$
10	prove $\sqrt{a_n b_n}$ and $\frac{1}{2}(a_n+b_n)$ have same limit
9	Prove $\|a+b\|+\|a-b\| \geq \|a\|+\|b\|$
7	Show $\lim_{n \to \infty} \min\{a_{n},b_{n}\} = \min\{a,b\}$

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1,127 Reputation

+8	prove: $\dfrac{2^{n+1}+(-1)^n}{3}$
+3	prove $f^{-1}(B)=A$
+5	how to prove: $A=B$ iff $A\bigtriangleup B \subseteq C$
+5	simple proof for logical formula

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3 Answers

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3	What is the value of D here?
1	What is the logic behind this answer?
0	How to find the limits by using series

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3 homework × 2	0 sequences-and-series × 15
3 puzzle	0 limit × 13
1 exponential-function	0 calculus × 11
0 problem-solving × 38	0 functions × 9
0 proof-writing × 36	0 elementary-set-theory × 8

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