What is the interval of convergence for ∑n=1∞(x−5)nn2\sum_{n=1}^{\infty} \frac{(x-5)^n}{n^2}∑n=1∞n2(x−5)n?
[4,6][4, 6][4,6]
(4,6)(4, 6)(4,6)
(4,6](4, 6](4,6]
[4,6)[4, 6)[4,6)