Question

Find the value of f(3) for each of the following:

1. f(x) = 7 – 8x 2. f(a) = -5(a – 2)
3. f(h) = - h/72 4. f(m) = m(m + 4)

Answer 1

Explanation:

1) f(x) = 7 - 8x²

f(3) = 7 - 8*3²

= 7 - 8*9

= 7 - 72

f(3) = -65

2) f(a) = -5(a-2)

f(3) = -5(3 -2) = -5 * 1 = -5

`3)f(h) =(-h)/(72)\\\\\\f(3)=(-3)/(72)=(-1)/(24)`

4) f(m) = m(m +4)

f(3) = 3*(3+4) = 3 * 7 = 21