#### Answer

No sum

#### Work Step by Step

Here, we have $a_n= a_1 r^{n-1}$ for the Geometric series.
In this problem we have Common ratio $r=\dfrac{7}{2}$
The sum of an infinite Geometric Series can be found using: $S_n=\dfrac{a_1}{1-r}$
Here, $r=\dfrac{7}{2} \gt 1$
Thus, there is no sum, that is $S_n=0$.