Electric Field of Two Charges : 15.0 points

A point charge is located at x=0, and a point charge is placed at on the -axis of a cartesian coordinate system.The goal of this problem is to determine the electric field, , at various points along the -axis.

(a)What is (in N/C) for -68.0 m ?

unanswered

What is (in N/C) at -0.42 m?

unanswered

What is (in N/C) at 65 m?

unanswered

(b) At what point (apart from ), is ? Express your answer in meters.