Mathematics 0580 · IGCSE · Exponential growth and decay

Exponential growth and decay — practice question

The function is given by $g(x)=4^{x+3}$.

(a)[1]

Determine the value of $x$ when $g(x)=1$.

(b)[2]

Find the inverse-function value $g^{-1}\!\left(\frac{1}{16}\right)$.

Worked solution & mark scheme

This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The value is $-3$.” …