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- Find 5th term in the series 5, 15, 45, -----Option: 1 155Opt
Find 5th term in the series 5, 15, 45, -----
Option: 1
155
Option: 2
215
Option: 3
175
Option: 4
405
Answers (1)
$a=5, \quad r=155=3, \quad n=5$
$5^{\mathrm{th}}$ 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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