For the infinite geometric series with $a = 4$, $r = \dfrac{1}{2}$, the sum to infinity is —

Question

Accepted Answer

$8$

Answer

$4$

Answer

$6$

Answer

$\dfrac{1}{2}$

For the infinite geometric series with a=4a = 4a=4, r=12r = \dfrac{1}{2}r=21​, the sum to infinity is —