माना a(1), a(2), a(3), ....., a(49) समान...

माना `a_(1), a_(2), a_(3), ....., a_(49)` समान्तर श्रेढी इस प्रकार है कि `overset(12)underset(k = 0) Sigma a_(4k +1) = 416` तथा `a_(9) + 43=66` यदि `a (2)/(1) + a_(2)^(2) + .....+ a_(17)^(2) = 140` मीटर है, तब m बराबर है :

A

66

B

68

C

34

D

38

Verified by Experts

The correct Answer is:

C

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