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Aug
25
reviewed Approve Computing $\int\frac{7x^{13}+5x^{15}}{(x^7+x^2+1)^3}\,dx$
Aug
25
reviewed Approve Kronecker symbol vs. Koblitz symbol
Aug
25
reviewed Reject Use Riesz theorem to show functional bounded
Aug
25
answered About complex power series
Jul
29
comment Dealing with indeterminate forms of the $1^\infty $ kind
What do you mean by inf+1?
Jul
28
comment Dealing with indeterminate forms of the $1^\infty $ kind
Yes, you can write $$ \ln{\left[\left(1+{x} \right)^{\frac{1}{x}}\right]}=\frac{1}{x}\cdot \ln\left(1+{x} \right)=\frac{\ln(1+x)}{x},$$ where $x=\frac{1}{n}$ and apply L'Hopital's rule.
Jul
28
answered Dealing with indeterminate forms of the $1^\infty $ kind
Jul
26
reviewed Approve How to understand $E(XY)$ intuitively
Jul
23
reviewed Approve How to draw graphs of functions?
Jul
23
comment How to draw graphs of functions?
gnuplot, free online services like SageMathCloud, SymPy Gamma
Jul
23
answered Coefficients of general Fourier Series
Jul
19
reviewed Approve INDUCTION: Let a sequence of numbers $a_n$ for $n\in \mathbb N$ be defined by the following rule: $a_1 = 1$, and for $n>1$, $a_n = 2a_{n-1} + 1$
Jul
19
reviewed Approve How to compute an expected value in shorter ways (when taking all possibilities into account isn't plausible.)
Jul
17
comment What is the solution(s) to $1^i$?
$e^{ix}$ is an $2\pi$-periodic function, thus we have $(e^{2kπi})^i=1^i, \ k\in\mathbb{Z}.$
Jul
14
reviewed Approve Prove the value of this infinite series
Jul
10
reviewed Approve integral question help me please
Jul
8
reviewed Approve Product of all elements in finite group
Jul
8
comment Is this multivariable function continuous?
What can you say about continuity at $(x,\,y)=(1,\,1)?$
Jul
5
reviewed Reject Generating vectors in a non-orthogonal 3D lattice with increasing magnitude
Jul
3
reviewed Approve $L^{\infty}$ norm