calc..integral test?

Question

Use the integral test to determine whether the series is convergent or divergent:

1) summation notation symbol (with n=1 on bottom and infinity on top) of 1/ 4th square root of n

2) summation notation symbol (with n=1 on bottom and infinity on top) of 1/n^4

show steps plz

Answer 1

Sum 1/n^1/4 >Int a, infinity 1/x dx which tends to infinity Divergent
2)sum 1/n^4

Answer 2

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