Cho f(x) = (2x – 3)5. K...

A

- Hướng dẫn giải

Chọn A.

f’(x) = 5(2x – 3)⁴(2x – 3)’ = 10(2x – 3)⁴

f”(x) = 40(2x – 3)³(2x – 3)’ = 80(2x – 3)³

f”’(x) = 240(2x – 3)²(2x – 3)’ = 480(2x – 3)²

Vậy: f”(3) = 80(2.3 – 3)³ = 2160

f”’(3) = 480(2.3 – 3)² = 4320