Suppose that $\frac{10x}{(11+x)} = \sum_{n=0}^{\infty} c_n x^n$. Find the first few coefficients. $c_0 =$ $c_1 =$ $c_2 =$ $c_3 =$ $c_4 =$ Find the radius of convergence $R$ of the power series. $R =$
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We can rewrite this as $$ \frac{10x}{11+x} = \frac{10x}{11(1+\frac{x}{11})} = \frac{10x}{11} \cdot \frac{1}{1+\frac{x}{11}} = \frac{10x}{11} \cdot \frac{1}{1-(-\frac{x}{11})} $$ Since $\frac{1}{1-u} = \sum_{n=0}^{\infty} u^n$ for $|u| < 1$, we have $$ Show more…
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