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Question

The sum of 50 terms of 312+512+22+712+22+32+.... is

A
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B
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C
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D
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Solution

The correct option is B
tr=2r+112+22+....+r2=6r(r+1)50r=1tr=650r=11r(r+1)=650r=1(1r1r+1)=6(1151)=10017

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