AIR MATH

Math Question

Find a power series representation for the function. (Give your power series representation centered at \( x=0 \).)
\[
\begin{array}{c}
f(x)=\frac{7}{1-x^{2}} \\
f(x)=\sum_{n=0}^{\infty}(1) \\
\text { 火 }
\end{array}
\]
Determine the interval of convergence. (Enter your answer using interval notation.)

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