Concavity from second derivative (f''>0 → concave up (convex); f''<0 → concave down)
jee-mainjee-advanced
f''>0 → concave up (convex); f''<0 → concave down
What each symbol means
| Symbol | What it stands for |
|---|---|
| f''(x) | Second derivative on interval I |
When to use this
f twice differentiable on I. JEE: concave up = cup opens upward.