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Jan
28
comment Simple complex analysis inverse
Try this method math.stackexchange.com/questions/1121059/…
Jan
27
comment Complex hyperbolic Trigonometry
@columbus8myhw, Agreed & the current version is also technically correct
Jan
27
comment Complex hyperbolic Trigonometry
@phandaman, How about this?
Jan
27
answered Complex hyperbolic Trigonometry
Jan
27
comment Is there an obvious reason why $4^n+n^4$ cannot be prime for $n\ge 2$?
@barakmanos, Please find the edited version
Jan
27
answered Is there an obvious reason why $4^n+n^4$ cannot be prime for $n\ge 2$?
Jan
27
comment For how many integers is this a prime number?
@Amad27, Think of the reverse condition.
Jan
27
answered For how many integers is this a prime number?
Jan
27
revised how old are Inee and Imee now?
added 55 characters in body
Jan
27
answered how old are Inee and Imee now?
Jan
27
comment Limit find $f(x)$ $ \lim_{x\to1}\frac{f(x)\cos{\frac{\pi x}{2}}}{\sqrt[3]x-1}=3 $
@Parhs, Yes as we can use $\lim_{h\to0}\dfrac{\sin h}h=1$
Jan
27
answered Limit find $f(x)$ $ \lim_{x\to1}\frac{f(x)\cos{\frac{\pi x}{2}}}{\sqrt[3]x-1}=3 $
Jan
27
answered Antiderivative of $\frac{\sqrt{4-x}}{x\sqrt{x}}$
Jan
27
comment Imaginary part of $ln(\sqrt{i})?$
@Did, How to increase the legibility of the exponent?
Jan
27
revised Imaginary part of $ln(\sqrt{i})?$
added 25 characters in body
Jan
27
revised Finding the limit of the following expression
added 220 characters in body
Jan
27
answered Finding the limit of the following expression
Jan
27
answered Imaginary part of $ln(\sqrt{i})?$
Jan
27
comment Number of real roots of $2 \cos\left(\frac{x^2+x}{6}\right)=2^x+2^{-x}$
@User786, The 1st one is AM-GM. We have $2\cos\dfrac{x^2+x}6\le2$ and $2^x+2^{-x}\ge2$. For the existence of the solution, what do we need?
Jan
27
answered Number of real roots of $2 \cos\left(\frac{x^2+x}{6}\right)=2^x+2^{-x}$