Answer
$2+\sqrt 2$
Work Step by Step
The sum of a geometric series can be found as:
$S=\dfrac{a}{1-r}$
Here, $a=1, r=\dfrac{1}{\sqrt 2} \lt 1$
Thus,
$S=\dfrac{a}{1-r}=\dfrac{1}{1-\dfrac{1}{\sqrt 2}}=\dfrac{\sqrt 2}{\sqrt 2-1}=2+\sqrt 2$