Math, asked by sodhi13, 11 months ago

The sum of n terms of an A. P. is 3n² +5. If t, of the
series is 159, then n equals
(a) 13
· (b). 21
(d) none of these
(c) 27
.​

Answers

Answered by zaidazmi8442
1

i \: think \: option \: (d) \: is \: right

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