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Question

Find the sum of the series 14×7+17×10+110×13+....+125×28.


A

6/28

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B

1/14

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C

3/28

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D

1/28

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Solution

The correct option is B

1/14


We can rewrite the given series in the form : (13)[(1417)+(17110)+(110113)+........+(125128)]

Therefore, sum of the series, S=(13)(14128)=(13)×(628)=114.


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