7. Consider a line of charge that extends along the x axis from x = 0 to x = 4.9 m.The line has a non-uniform linear charge density given by A(x) = 8.8 x2 (nC/m).Calculate the electric potential at x = -2.7 m. Use k = 9 x 109 N m2 / C2. You may need to use u-substitution if you choose to evaluate the integral yourself.
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