JEE Main 2019 Mathematics question
Let be a twice differentiable function such that , for all x ∈ (0, 2). If , then φ is:
Answer: (D)
Solution
with f′ increasing: φ′ > 0 iff x > 2 − x, i.e. x > 1.
Let be a twice differentiable function such that , for all x ∈ (0, 2). If , then φ is:
with f′ increasing: φ′ > 0 iff x > 2 − x, i.e. x > 1.