If fourth term of a G.P. is 3, the product of the first seven terms is

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Solution

The correct option is B
As the number of terms are odd (7) let r, be the common ratio So terms can be taken as $\frac{a}{r^{3}}, \frac{a}{r^{2}}, \frac{a}{r}, a, a r, a r^{2}, a r^{3}$
$∴$ Product of the term= $a^{7}$
$= 3^{7} a s (t_{4} = a = 3)$

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