$a_{1} = - 2$ , $r = - 1$ . Find the $5^{t h}$ term in GP.

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Solution

The correct option is D $- 2$
Given, $a = - 2$ , common ratio $= - 1$
We know the formula for $n^{t h}$ term,
$t_{n} = a r^{n - 1}$
$t_{5} = - 2 \times - 1^{5 - 1}$
$= - 2 \times - 1^{4}$
$= - 2 \times 1$
$= - 2$

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