Question

Given f(x) = x^ 2+3 and g(x) = x+5/x find (g o f)(4)

Answer 1

I got 14/19

Answer 2

@undeadknight26

Answer 3

I hate thees

Answer 4

I hate them as much as you do, and it's barely the second day of school, sheesh.

Answer 5

Sorry m8
@dumbcow @Koikkara @Lady.Liv1776 @LunyMoony @whpalmer4 @rishavraj @rvc

Answer 6

. . . xD

Answer 7

What does the 'o' mean in " (g o f)" first though?

Answer 8

http://prntscr.com/88qogy

Answer 9

i dont like the notation for these

(f o g) is same as f(g)

so (g o f)(4) = g(f(4))

Answer 10

g of f

Answer 11

Ok, thx

Answer 12

plug in 4 into "f", then plug that num into "g"

Answer 13

f(4) = x^2+3 and g(4)?

Answer 14

no , finish f(4) first .... what do you get?

Answer 15

Finish f(4)? How do I do that?

Answer 16

\[f(x) = x^2 +3\]
\[f(4) = 4^2 + 3\]
--you substitute the "x" with "4"

Answer 17

Oh I figured.

f(4)=4^2+3
g(4)(4)?

Answer 18

Nevermind I don't know what I'm doing.

Answer 19

Can someone just tell me if I'm right or not? xD

Answer 20

oh sorry, so whats 4^2 +3 ?

Answer 21

Oh I thought that was the final product. I don't know f(x)

Answer 22

you are over thinking it..... 4^2 +3 = what

Answer 23

19?

Answer 24

very good.... now use this number for function g

---> g(19) = (x+5)/x = (19+5)/19 = ?

Answer 25

1.26?

Answer 26

yeah or just 24/19

\[g(f(4)) = g(19) = \frac{24}{19}\]

Answer 27

Oh, thank you so much!

Answer 28

yw