Question

@Directrix i need help a lot. Can you explain how to work this out?

Answer 1

let f(x) = x^2 +7

Answer 2

and g(x) = (x+3)/x

Answer 3

find (G o F) (-5)

Answer 4

Can you help me work through this?

Answer 5

(G o F) (-5) is the same as g(f(-5))

Answer 6

you need to find f(-5) first

Answer 7

ok.

Answer 8

32

Answer 9

you start from the inside and work your way outside

Answer 10

Right?

Answer 11

yes, f(-5) = 32

Answer 12

g(f(-5)) = g(32)

Answer 13

ok now? would I plug that into g?

Answer 14

notice how I replaced f(-5) with 32 since the two are equal

Answer 15

yeah

Answer 16

since g(f(-5)) = g(32)

Answer 17

so the answer would be, 35/33?

Answer 18

not 33

Answer 19

32*

Answer 20

yes 35/32

Answer 21

I typed it wrong sorry

Answer 22

Thank you I totally get it now.

Answer 23

I'm glad it's clicking

Answer 24

So just make it g(f(x)) and work out?

Answer 25

I knew this at one point but it's been awhile.

Answer 26

yes that is correct. I think once you get it to g(f(x)), then it shouldn't be too bad

Answer 27

Ok, awesome. I gave you a medal thank you for the help!

Answer 28

sure thing