Two charged particles are attached to an x axis: Particle 1 of charge -2.00 *10^7 C is at position x=6.00 cm and particle 2 of charge +2.00*10^7 C is at position x=21.0 cm. Midway between the particles, what is their net electric field in unit-vector notation?

a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)

answer: a) y=-8x+5

a) m= -8

b) m= -2

c) m= 7

d) m= 6