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For a epsilonR (the set of all real numb...

For `a epsilonR` (the set of all real numbers) `a!=-1`,
` lim_(n to oo) ((1^(a)+2^(a)+………+n^(a)))/((n+1)^(a-1)[(na+1)+(n+2)+………..+(na+n)])=1/60`
Then `a=`

A

`5`

B

`7`

C

`(-15)/(2)`

D

`(-17)/(2)`

Text Solution

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The correct Answer is:
B, D
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