Question

If f(x)=4x+7 and g(x)= sqrt(x-3), what is (fog)(4)

Answer 1

keep getting these square root ones wrong. medal to correct answer

Answer 2

lol bribing?

Answer 3

well, just want people to double check there answer

Answer 4

well what's your answer

Answer 5

lemme do it

Answer 6

tag me when you have an answer

Answer 7

\[\sqrt{23-3}\]

4.4721


but thats not right.

Answer 8

@lgbasallote

Answer 9

solve for g(4) first

Answer 10

\[(f o g)(4) \implies f(g(4))\]

Answer 11

ahhh, so 11

Answer 12

yup

Answer 13

here is one that introduces h @lgbasallote Let f(x)=(4x^3+20)^2 and g(x)=4x^3+20. Given that f(x)=(hog)x, find h(x)

Answer 14

where do i start with that

Answer 15

find (h o g) x first

Answer 16

sorry to interrupt but Prefer this link .. for understanding ;
http://www.regentsprep.org/Regents/math/algtrig/ATP7/compositionfunctions.htm

Answer 17

see the examples. .

you may continue @lgbasallote

Answer 18

this may help, in helping me

Answer 19

wait, how do i find (hog)?

Answer 20

find g(x) first

Answer 21

what is g(x)

Answer 22

what do i use for x?

Answer 23

x

Answer 24

isnt it just 4x^3+20 then?

Answer 25

yup

Answer 26

so therefore

h(4x^3 + 20) = f(x) do you agree with this?

Answer 27

yes

Answer 28

where do i use that?

Answer 29

hmm this was easier in my head...

Answer 30

lol

Answer 31

how will you turn h(4x^3 + 20) into h(x) what do you think?

Answer 32

geeze, I have no clue.

Answer 33

me neither :/

Answer 34

try posting it as a new question maybe someone has an idea