Solve for Y
Y=\sqrt{|x|}\left(\sum _{k=1}^{\infty}\frac{\left(2k\right)!}{k^{3}}\right)
k\neq 0
Solve for x
\left\{\begin{matrix}x=0\text{, }&k\neq 0\\x\in \mathrm{R}\text{, }&\left(2k\right)!=0\text{ and }k\neq 0\end{matrix}\right.
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