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17 Answers

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10	How I can prove that converges to 2?
6	Find the maximum value of the product xyz?
6	Proving $\sum_{k=1}^n k\cdot k! = (n+1)!-1$ without using mathematical Induction.
5	Why everytime the final number comes the same?
4	Proving that a natural number is divisible by $3$

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859 Reputation

+10	Proving $\sum_{k=1}^n k\cdot k! = (n+1)!-1$ without using mathematical Induction.
+10	How I can prove that converges to 2?
+10	How to prove $\lim_{n\rightarrow \infty} {a^n \over n!}=0$
+5	Cauchy Riemann equations for real functions.

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8 Questions

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14	Why aren't all dense subsets of $\mathbb{R}$ uncountable?
6	what is value of $\lim_{n\to\infty} n^{-2}e^{(\log(n))^a}$?
5	What is the value of $\displaystyle\lim_{R\to\infty} {\int_R^{\infty}{r^ne^{-r^2/2}dr}\over{R^{n-1}e^{-R^2/2}}}$
4	How to construct a dense subset of $\mathbb R$ other than rationals.
3	Is there is a number system which is extension of complex number system?

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25 Tags

19 sequences-and-series × 6	6 alternative-proof
16 real-analysis × 8	6 factorial
15 homework × 3	5 puzzle
11 algebra-precalculus × 2	4 calculus × 3
6 inequality	4 elementary-number-theory

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