JEE Main 2026 Mathematics question

MathematicsDefinite IntegrationJEE Main 2026

Let f : ℝ→ℝ be such that f(xy)=f(x)f(y), for all x,y∈ℝ and f(0)≠0. Let g : [1,∞)→ℝ be a differentiable function such that . Then g(2) is equal to:

Answer: (C)

Solution

f(0)=f(0)f(y) with f(0)≠0 gives f≡1. Differentiating x²g(x)=∫₁ˣ(t²−tg)dt: x²g′+2xg=x²−xg, so

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-015577