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If the sum of n terms of an A.P., is 3n^...

If the sum of `n` terms of an A.P., is `3n^2+5n` then which of its terms is 164?
a.`26 t h` b. `27 t h` c. `28 t h` d. none of these

A

`25^(th)`

B

`26^(th)`

C

`27^(th)`

D

`28^(th)`

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AAKASH INSTITUTE ENGLISH-SEQUENCES AND SERIES -Assignment (SECTION - A) One option is correct
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  16. If the sum of three numbers which are in A.P is 27 and the product of ...

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  18. If S(n) denote the sum to n terms of an A.P. whose first term is a ...

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  19. If three positive numbers a, b, c are in A.P. and 1/a^2,1/b^2,1/c^2 a...

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