shayfalador

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bio	website	shay.co
	location	Israel
	age	18
visits	member for	2 years
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3 Questions

views newest activity votes

6

20

votes

6

answers

801

views

Uses of $\lim \limits_{h\to 0} \frac{f(x+h)-f(x-h)}{2h}$

calculus limit derivatives

jul 15 at 13:03 J. M. 38.9k

7

votes

2

answers

99

views

Why is $f:\mathbb{R} \to S^1, f(t)=(2\pi \cos(t), 2\pi \sin(t))$ not closed?

general-topology

mar 18 at 20:58 P.. 8,925

2

5

votes

5

answers

514

views

Are there any calculus/complex numbers/etc proofs of the pythagorean theorem?

calculus complex-numbers

jun 1 '12 at 6:35 Vasea Igor 19

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