Question

convergence test on given sums...

Answer 1

Hey @oldrin.bataku, im sure that 6 is A, that one is pretty obvious but for the others i have... 1(C) 2(C) 3(D) 4(E) 5(C) 6(A)

Answer 2

Are you sure you wouldn't use the alternating series test for 1, 2 and 3?

Answer 3

for the fist one its showing that 1(c) 2(d) 3(d) so that helped but there is still one wrong

Answer 4

4 and 5 are the concerns now

Answer 5

4,5 are definitely possible to do with a limit comparison.

Answer 6

thats what i thought but it takes points away when i enter 4 as comparison and not alt series test

Answer 7

(4) can be treated as an alternating series since \(\cos n\pi=(-1)^n\).

Answer 8

indeed i noticed that thats what threw me to alt first.