Question
Mathematics Question on Tangents and Normals
Let a curve y = f(x), x ∈ (0, ∞) pass through the points p(123) and Q (a,21). If the tangent at any point R(b, f(b)) to the given curve cuts the y-axis at the point S (0, c) such that bc = 3, then (PQ)2 is equal to ______.
Answer
The correct answer is: 5