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location UK; Sheffield, Cambridge, London.
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visits member for 3 years
seen 3 hours ago

Sep
18
reviewed Approve Can I cancel out quotient function safely?
Sep
18
reviewed Approve Why are huge binary numbers about 3.3218 times longer than their decimal counterpart?
Sep
18
reviewed Approve Suppose n is an integer. Use a proof by contrapositive to show if n^3 is even, then n is even
Sep
18
reviewed Approve The Radon–Nikodým theorem for vector valued measures
Sep
18
comment How to integrate $\frac{y^2-x^2}{(y^2+x^2)^2}$ with respect to $y$?
You could try using $\sin^2\theta-\cos^2\theta=-\cos(2\theta)$.
Sep
18
reviewed Approve How to combine two functions into one continuous function so it can be integrated/differentiated?
Sep
18
revised Two methods to integrate?
added 3 characters in body
Sep
18
reviewed Approve If $f(x)=\frac{2^{2x}+2^{-x}}{2^{x}-2^{-x}}$ then evaluate $f(\log_2(3))$
Sep
18
revised Two methods to integrate?
deleted 1 character in body
Sep
18
revised Two methods to integrate?
added 73 characters in body
Sep
18
comment Evaluating $\int_0^{\frac\pi2}\frac{\ln{(\sin x)}\ \ln{(\cos x})}{\tan x}\ dx$
That's the first integral in a long time I've seen where the Taylor series has been used to expand an improper integral! Nice to see.
Sep
18
revised How to solve these equations?
added 2 characters in body
Sep
18
answered Two methods to integrate?
Sep
17
reviewed Approve Is this another identity of exponential formula
Sep
17
revised The limit of $(n!)^{1/n}/n$ as $n\to\infty$
added 1 character in body
Sep
17
revised Two reasons why $\int^{1}_{0}f(x) \,dx$ exists?
edited body
Sep
17
reviewed Approve Conditional probability of picking particular second letters in Scrabble, given the first letter picked
Sep
17
accepted When can I expect the derivative of an inequality to always hold true?
Sep
17
comment When can I expect the derivative of an inequality to always hold true?
@ drhab Thanks. I found this, the answer to which implies the very same: math.stackexchange.com/questions/64682/…. Boo.
Sep
17
asked When can I expect the derivative of an inequality to always hold true?