1.

Determine the radius of convergence and interval of convergence for the power series: ∞∑n=0 (x−7)^n+1/n^n.(a) 0, −1

Answer»

The CORRECT choice is (b) ∞, −∞<X<∞

Explanation: So, L=limn→∞∣(x−7)^n+1/n^n∣

L=limn→∞∣x−7/n∣

L=|x−7|limn→∞1/n=0

So, since L=0<1 any of the value of x, this power SERIES will CONVERGE for every x. In these cases, the radius of CONVERGENCE is R=∞ and interval of convergence is −∞



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