If one AM $a$ and two GMs $p$ and $q$ are inserted between two positive numbers, then the value of $p^3 + q^3$ is
- A. $2apq$
- B. $pq/a$
- C. $2pq/a$
- D. $p + q + a$
✅ Correct Answer: $2apq$
Explanation
Let the numbers be $x$ and $y$ $(x + y)/2 = a$ $x + y = 2a$ $x, p, q, y$ are in GP $p^2 = xq$ $q^2 = py$ $p^3 + q^3 = pq(x + y)$ $= pq(2a) = 2apq$
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