JEE MATHEMATICS MCQ: SEQUENCE OF SERIES

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Analyzing +4 | -1

Let

a_{n}

n^{\text {th }}

term of the series

5+8+14+23+35 +50+\ldots

and

S_{n}=\sum\limits_{{k=1}}^{n} a_{k}

. Then

S_{30}-a_{40}

is equal to

View answer and explanation

Correct option: C

11290

Option C, 11290, is the correct value of

S_{30}-a_{40}

for the given series. This is calculated by finding the general term

a_n

and the sum

S_n

, then substituting n=30 and n=40.

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