For the infinite geometric series with $a = 5$, $r = \dfrac{1}{2}$, the sum to infinity is —

Question

Accepted Answer

$10$

Answer

$5$

Answer

$\dfrac{5}{2}$

Answer

$\dfrac{1}{10}$

For the infinite geometric series with a=5a = 5a=5, r=12r = \dfrac{1}{2}r=21​, the sum to infinity is —