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JEE Main 2021
26-08-2021 S1
Question
If the sum of an infinite GP a, ar, $a r^2, a r^3, \ldots$ is 15 and the sum of the squares of its each term is 150 , then the sum of $a r^2, a r^4, a r^6, \ldots$ is :
Select the correct option:
A
$\frac{5}{2}$
B
$\frac{1}{2}$
C
$\frac{25}{2}$
D
$\frac{9}{2}$
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
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