Q. If three positive numbers $a, b$ and $c$ are in $A . P .$ such that $ab c = 8$ , then the minimum possible value of $b$ is :

1712 220 JEE MainJEE Main 2017Sequences and Series Report Error

A

2

64%

B

$4^{\frac{1}{3}}$

18%

C

$4^{\frac{2}{3}}$

9%

D

4

9%

Solution:

$a + c = 2 b$
$a . c . (\frac{a + c}{2}) = 8$