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For the S(n)=3n^(2)+5n sequence, the num...

For the `S_(n)=3n^(2)+5n` sequence, the number 5456 is the

A

153th term

B

932th term

C

707th term

D

909th term

Text Solution

Verified by Experts

The correct Answer is:
D
Given, `T_(n)=5456`
`implies 6n+2=5456 implies 6n-5454`
`:. N=909`
`:.` The number 5456 is the 909th term.
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ARIHANT MATHS-SEQUENCES AND SERIES-Exercise (Questions Asked In Previous 13 Years Exam)
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  8. Let V(r ) denotes the sum of the first r terms of an arithmetic progre...

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  11. LetA(1),G(1),H(1) denote the arithmetic, geometric and harmonic means ...

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  12. In a G.P of positive terms if any term is equal to the sum of the next...

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  13. Suppose four distinct positive numbers a(1),a(2),a(3),a(4) are in G.P....

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  14. The first two terms of a geometric progression add up to 12. The sum o...

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  15. If the sum of first n terms of an A.P. is cn^(2) then the sum of squar...

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