Question

-x if x si
Find f(7) for f(x) = 3 x + 5 if 15x<2
x? if x 22

Answer 1

`f(7) = 49`

Explanation:

Given

`f(x) = \left[\begin{array}{cc}3x+5&1.5 <x < 2\\x^2&x>2\end{array}`

Required

Determine f(7)

To do this, we make use of

`f(x) = x^2`

Because
`7 > 2`

So, we have:

`f(x) = x^2`

This becomes:

`f(7) = 7^2\\`

`f(7) = 49`