Three particles are fixed on an x axis. Particle 1 of charge `q_(1)` is at x = -a, and particle 2 charge `q_(2)` is at x = +a. If their net electrostatic force on particle 3 of charge +Q is to be zero, what must be the ratio `q_(1)//q_(2)` when particle 3 is at (a) x = +0.750 a and (b) x = +1.50 a ?

Explanation

To solve the problem step by step, we will analyze the forces acting on the third particle (charge +Q) due to the first two particles (charges q1 and q2) at the specified positions.

### Given:
- Charge q1 is located at \( x = -a \)
- Charge q2 is located at \( x = +a \)
- Charge Q is located at either \( x = +0.750a \) or \( x = +1.50a \)

### Part (a): When \( x = +0.750a \)
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