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Find sun of first 15 term of series 1+6...

Find sun of first 15 term of series `1+6+(9(1^2+2^2+3^2))/(7)+(12(1^2+2^2+3^2+4^2))/(9)+`?. (a) `7620` (b) `7280` (c) `7820` (d) `7067`

A

7820

B

7830

C

7520

D

7510

Text Solution

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The correct Answer is:
A
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ALLEN-SEQUENCE AND PROGRESSION-Exercise (JM)
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  11. Find sun of first 15 term of series 1+6+(9(1^2+2^2+3^2))/(7)+(12(1^2+...

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  12. If x and y are positive real numbers and m, n are any positive integ...

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  16. Let the sum of the first n terms of a non-constant A.P., a(1), a(2), a...

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  17. The sum (3 xx 1^(3))/(1^(2)) + (5 xx (1^(3) + 2^(3)))/(1^(2) + 2^(2)) ...

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  18. Let numbers a(1),a(2)…a(16) are in AP and a(1)+a(4)+a(7)+a(10)+a(13)+a...

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