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Find 5th term in the series 5, 15, 45, -----

Option: 1

155


Option: 2

215


Option: 3

175


Option: 4

405


Answers (1)

best_answer

$a=5, \quad r=155=3, \quad n=5$
$5^{\mathrm{th}}$ term, $\mathrm{t}_5=\mathrm{ar}^{\mathrm{n}-1}=5 \times 3^{2-1}=5 \times 3^4=5 \times 81=405$

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manish painkra

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