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Q. The third term of a G.P. is 9. The product of its first five terms is

KCETKCET 2019Sequences and Series

Solution:

$Let \frac{a}{r^{2}}.\frac{a}{r}.a.ar.ar^{2} $ are in G.P., Given a = 9
$\therefore \, product =9^{5}=3^{10}$