Question

Let f(x) = x2 + 6 and g(x) = x+8/x. Find ( g o f)(-7)

Answer 1

A. 384/7
B. 63/55
C. -57/7
D. 295/49

Answer 2

@tgawade

Answer 3

(gof)(-7) = g(f(-7)) so first we find f(-7)

We have f(x) = x^2 + 6 so just replace x by -7 what do you get f(-7) = -----?

Answer 4

??

Answer 5

Idk sorry

Answer 6

Ohh wait

Answer 7

that is f(-7) = (-7)^2 + 6 = ------?

Answer 8

-43

Answer 9

I know sorry I wasn't paying attention

Answer 10

no please check it , square of any negative number is positive ..

So f(-7)= 49 + 6 = ---------?

Answer 11

55

Answer 12

Answer is B ?

Answer 13

Yes so we have f(-7) = 55
since we are finding (gof)(-7) = g(f(-7)) ==> g(55) we know that g(x) = (x + 8)/x
So g(55) = (55+8)/55 = ----------?

Answer 14

Thanks

Answer 15

:)