JEE MATHEMATICS MCQ: SEQUENCE OF SERIES

1 Easy

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Analyzing +4 | -1

Let

\mathrm{a}_{1}, \mathrm{a}_{2}, \ldots \ldots, \mathrm{a}_{30}

be an A.P.,

\mathrm{S}=\sum_{i=1}^{30} \mathrm{a}_{i}

and

\mathrm{T}=\sum_{i=1}^{15} \mathrm{a}_{(2 i-1)}

\mathrm{a}_{5}=27

and

\mathrm{S}-2 \mathrm{T}=75

, then

\mathrm{a}_{10}

is equal to:

View answer and explanation

Correct option: A

The correct answer is 52 because by using the properties of arithmetic progressions and the given equations, we can find the value of

a_{10}

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