Question

Let f(x) = x² + 6 and g(x)=x+8/x find (g*f)(-7)

a)-55/7
b)384/7
c)295/49
d)63/55

Answer 1

@campbell_st

Answer 2

well f*g(x) will be
\[\frac{(x^2 + 6)(x + 8)}{x}\]

just substitute x = -7 and evaluate

Answer 3

i got D as my answer is that right?

Answer 4

I got A

(49 + 6)(-7 + 8)/-7 = (55 x 1)/-7 = - 55/7