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###### Anku posted an Question
December 12, 2021 • 12:44 pm 30 points
• IIT JAM
• Mathematics (MA)

# How to solve pls once show steps..

how to solve pls once show steps... . . . . . . . . . . . . . . . . . . . . . . .. .. . . . . .

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• ##### Anonymous User

its right answer is c consider a sequence Xn. =0 prime 1 otherwise then x2n converge to 1 ie K=1 x3n converge to 1 ie L=1 K=L but Xn not convergent

for more watch https://youtu.be/wrIOTlVm4hY

watch vedio

cos(npi) = (-1)^n so (-1)^3n = -1or 1

• ##### Deepak singh 1 Best Answer

Refer attachment option d

sir option 2 is also correct as per answer key

take xn= sin(πn) then option b is incorrect .

• ##### Anonymous User

if xn=(-1)^n. then X2n=1 and x3n=-1 options D xn=1/n then x2n=1/2n k=0 and x3=1/4n L=0 K=L

for option d you took sequence xn=(-1)ⁿthen x2n=1 BUT x3n={1,-1} because x3=-1 and x6=1 and x9=-1 and so on

yes

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