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Statement -1 : The sum of the series ...

Statement -1 : The sum of the series
`(1+(1+2+3+4)+(4+5+9)+(9+12+16)+(361+380+400) "is"8000`
Statement -2 : `underset(k=1)overset(n)sum[k^(3)-(k-1)^(3)]=n^(3)` for any natural number n .

A

Statement -1 is true ,statement -2 is true . Statement-2 is not a correct explantion for Statement -1.

B

Statement -1 is true ,Statement -2 is false .

C

Statement -1 is false ,Statement -2 is true .

D

Statement -1 is true , Statement -2 is true ,Statement -2 is a correct explanation for Statement -1.

Text Solution

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The correct Answer is:
D
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