Question

If `f(x) = 2/3x^2 + 8x`, what is the value of `f(6)`?

Answer 1

`f(6)=72`

Explanation:

`"to evaluate "f(6)" substitute x = 6 into "f(x)`

`f(color(red)(6))=2/3xx(color(red)(6))^2+(8xxcolor(red)(6))`

`color(white)(xxx)=2/cancel(3)^1xxcancel(36)^(12)+48`

`color(white)(xxx)=24+48=72`