429 reputation
311
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location France
age 20
visits member for 3 years, 3 months
seen Dec 15 at 10:38

Oct
14
accepted Sum of a nearly classic series
Oct
14
asked Sum of a nearly classic series
Sep
16
accepted Convergence of a series?
Sep
16
revised Convergence of a series?
added 1 characters in body
Sep
16
comment Convergence of a series?
Right, I was talking about $\sum u_n$
Sep
16
revised Convergence of a series?
added 10 characters in body
Sep
16
asked Convergence of a series?
Sep
5
accepted Asymptotic analysis of a recurring sequence
Sep
4
comment Prove that $\sqrt{a}\leq\frac{1+a}{2}$
Seems really nice though I can't understand why the line is $\sqrt{ab}$ long
Sep
4
asked Asymptotic analysis of a recurring sequence
Sep
4
comment Inequality proof on a sequence
Thank you for the really clear answer !
Sep
4
accepted Inequality proof on a sequence
Sep
4
asked Inequality proof on a sequence
Sep
4
accepted Prove that $\sqrt{a}\leq\frac{1+a}{2}$
Sep
4
comment Prove that $\sqrt{a}\leq\frac{1+a}{2}$
Well, it was really simple... Sorry for the beginner's question.
Sep
4
comment Prove that $\sqrt{a}\leq\frac{1+a}{2}$
No I don't already know this one.
Sep
4
asked Prove that $\sqrt{a}\leq\frac{1+a}{2}$
Sep
4
awarded  Yearling
Jun
19
accepted Derivative of a composition
Jun
19
comment Derivative of a composition
This proof seems really nice. In fact, I tried it this way... But how do you expand $f\bigl(g(x)+hg'(x)+o(h)\bigr)$ ? (without any hypothesis on what function $f$ is)