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Nov
8
comment Finding upper bound for sum
@MarcusStuhr Hang on a second, doesn't that give $\ln \sqrt {61}$ rather than $\ln 61$?
Nov
8
revised Finding upper bound for sum
deleted 1 character in body
Nov
8
asked Finding upper bound for sum
Oct
6
revised Proof that $e^x$ can be expressed in a series of ascending powers of $x$
deleted 1 character in body
Aug
27
comment How to solve equations to the fourth power?
@AlecTeal In my opinion that is unnecessarily rude. This site is for people of any mathematical ability who may not spot things as easily as you do.
Aug
19
comment Cube root of complex number without trigonometric functions
Please learn Mathjax before posting so we can read the formulas that you write
Aug
9
awarded  Quorum
Aug
9
accepted Fraction of original velocity in series of elastic collisions
Aug
9
asked Fraction of original velocity in series of elastic collisions
Jul
5
comment How to calculate $\int \frac{\sin x}{\tan x+\cos x} \, dx$
I'd probably try splitting it into partial fractions
Jun
28
answered Question about logarithmic eqations
Jun
28
revised Question about logarithmic eqations
fixed formatting
Jun
28
comment Question about logarithmic eqations
It doesn't have a solution in terms of elementary functions, you need to use the Lambert W function
Jun
28
suggested approved edit on Question about logarithmic eqations
Jun
23
comment Why does $\cos(x) + \cos(y) - \cos(x + y) = 0$ look like an ellipse?
Completely unrelated, but that is one of the coolest graphs I've ever seen
Jun
23
accepted Roots of a sixth degree polynomial
Jun
23
asked Roots of a sixth degree polynomial
Jun
22
accepted Integrating $\frac{1}{1+e^x}$
Jun
22
comment Integrating $\frac{1}{1+e^x}$
Thanks for the answer, I can see the solution now. However I would appreciate it if you could explain why my working doesn't work. I can't see the mathematical issue with it
Jun
22
asked Integrating $\frac{1}{1+e^x}$