function evaluation

Practise function evaluation with an original VectorPaths question, worked explanation and related VCE Methods practice.

1 practice marks

Original practice question

Given $f: \mathbb{R} \to \mathbb{R}$, $f(x) = -2x^3$. Find the value of $f(3)$.

Worked explanation

• Substitute x = 3 into f(x)

  \[f(3) = -2(3)^3\]

• Calculate the result

  \[f(3) = -54\]

-54

Original VectorPaths practice; not an official VCAA question or marking rubric.