Mathematics 9709 · AS & A Level · Differentiation

Differentiation — practice question

The function $f$ has definition $f(x) = x^3 + 2x^2 - 4x + 7$ for $x \geq -2$.

(main)[4]

Determine, with all necessary working shown, whether $f$ is an increasing function, a decreasing function or neither.

Worked solution & mark scheme

This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The derivative is correct: $f'(x)=3x^2+4x-4$.” …