#217 · Complex Analysis · Series & singularities

Why the real series stops at 1

The function $\frac{1}{1 + x ^{2}}$ is smooth on all of $R$ , yet its Taylor series about $0$ converges only for $∣ x ∣ < R$ . Find $R$ .

~4 minAnswer checked instantlyRadius of convergenceComplex singularities

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