Q14
If the roots of the equation px2 + x + r = 0 are reciprocal to each other, then which one of the following is correct?
Answer: B
Key idea: if the roots are α and 1/α, their product is 1.
For \( px^2 + x + r = 0 \), the product of the roots = r/p.
r/p = 1, so p = r.
Answer: p = r (option 2)