(a). $\sum_{n=1}^{\infty} \frac{1}{4}$ (c). $\sum_{n=1}^{\infty} (\frac{-1}{3})^n$ (b). $\sum_{n=1}^{\infty} \frac{n^2+3}{3n^2-5}$ (d). $\sum_{n=1}^{\infty} \frac{1}{2^{n-2}}$
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n+3 = 1 + 3 = 4 Show more…
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