Evaluate the function at the specified value of the independent variable and simplify.

Question

f(x) = (2x^2 + 8x)/(5x^3 + 40) at x =
3.

Answer 1

wherever there is an x, plug in a 3 and then simplify:

f(3) = (2*3^2 + 8*3)/(5*3^3 + 40)
= (18+24)/(135+40)
= 42/175
= 6/25