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nth Term of A.P

If nth of a s...

Question

If $n^{t h}$ of a sequence is given by $T_{n} = 2 n + 1$ , then the sum of $4$ terms is

16

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24

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Solution

The correct option is B $24$
$T_{n} = 2 n + 1 \Rightarrow T_{1} = 3, T_{2} = 5, T_{3} = 7, T_{4} = 9$
Therefore, the required sum
$= 3 + 5 + 7 + 9 = 24$

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