JEE MATHEMATICS MCQ: SEQUENCE OF SERIES

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Application +4 | -1

Sum of the series

S=1+\frac{1}{2}(1+2)+

\frac{1}{3}(1+2+3)+\frac{1}{4}(1+2+3+4)+\ldots

upto 20 terms is

View answer and explanation

Correct option: C

115

Option C (115) is correct because the sum of the series can be simplified by finding a general term and then summing the resulting arithmetic series.

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