Question

Let p and q be two real numbers such that p + q = 3 and p⁴ + q⁴ = 369. Then (1/p + 1/q)^-2 is equal to ______

Answer 1

Correct answer is 4

p + q = 3 , p⁴ + q⁴ = 369

(24 is rejected because p² + q² = 9 – 2pq is negative)