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value of 1+(1^(3)+2^(3))/(1+2)+(1^(3)+2^...

value of `1+(1^(3)+2^(3))/(1+2)+(1^(3)+2^(3)+3^(3))/(1+2+3)+……+(1^(3)+2^(3)+….15^(3))/(1+2+…+15)-(1)/(2)(1+2+….+15)` is

A

620

B

1240

C

1880

D

660

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The correct Answer is:
A
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