PREVIOUS AA

Two positive point charges each have a charge of $+q$ and are fixed on the $y$ axis at $y=+$a and $y=-a.($Use the following as necessary: $k,a,a,$ and $x.)$

$($a$)$ Find the electric potentifl at any point on the $x$ axis.

$V(x)=\frac{2kq}{\sqrt[\phantom{2}]{x^2+a^2}}$

$($b$)$ Use your result in part $($a$)$ to find the electric field at any point on the $x$ axis.

vec$(E)(x)=\frac{2kqx}{(x^2+a^2{)}^{(\frac{3}{2})}}$