Question

The function f is defined by f(x)=2x^2-3Find f(3x).

Answer 1

The function f is defined by

`f(x)=2x^2-3`

To find f(3x), we would need to replace x in the function with 3x. This can be written as:

`\begin{gathered} f(3x)=2(3x)^2-3 \\ f(3x)=2(9x^2)-3 \\ f(3x)=18x^2-3 \end{gathered}`

Therefore, the answer is

`f(3x)=18x^2-3`