Question

study convergence of series cosn^(1/2)/n
please help me

Answer 1

as n goes to what?

Answer 2

cos of anything is inbetween 1 and 0

Answer 3

as n increases it will make this number between -1 and 1 less and less

Answer 4

n goes infinity

Answer 5

ok basically its just a cos curve that is osscilating with less and less amplitude

Answer 6

eventually as n goes to infinity it will pretty much oscillate around 0

Answer 7

speaking only in math then

Answer 8

hmm im not sure if lhopital is allowed here is it?

Answer 9

not allowed

Answer 10

i should proof that cossqrt1+cossqrt2+...+cossqrtn is bounded

Answer 11

oh series ok xD