Use the limit comparison test to determine whether ∑n=7[infinity]an=∑n=7[infinity]9n3− 6n2+76+3n4 converges or diverges. (a) Choose a series ∑n=7[infinity]bn with terms of the form bn=1np and apply the limit comparison test. Write your answer as a fully simplified fraction. For n≥7, limn→[infinity]anbn=limn→[infinity] (b) Evaluate the limit in the previous part. Enter [infinity] as infinity and −[infinity] as -infinity. If the limit does not exist, enter DNE. limn→[infinity]anbn =