What is the $5^{t h}$ term of this sequence?
$5, 10, 20, . . .$

30

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40

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50

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80

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Solution

The correct option is A $80$
Given series is $5, 10, 20, . . . .$
The common ratio of the sequence is $2$ .
The general form of G.P is $a, a r, a r^{2}, a r^{3}, a r^{4} . . .$
Here $a = 5$ and $r = 2$
So, the $5^{t h}$ term is $5 \times 2^{4} = 80$ .

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