anonymous
  • anonymous
If f(x)=4x+7 and g(x)= sqrt(x-3), what is (fog)(4)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
keep getting these square root ones wrong. medal to correct answer
lgbasallote
  • lgbasallote
lol bribing?
anonymous
  • anonymous
well, just want people to double check there answer

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lgbasallote
  • lgbasallote
well what's your answer
anonymous
  • anonymous
lemme do it
lgbasallote
  • lgbasallote
tag me when you have an answer
anonymous
  • anonymous
\[\sqrt{23-3}\] 4.4721 but thats not right.
anonymous
  • anonymous
@lgbasallote
lgbasallote
  • lgbasallote
solve for g(4) first
lgbasallote
  • lgbasallote
\[(f o g)(4) \implies f(g(4))\]
anonymous
  • anonymous
ahhh, so 11
lgbasallote
  • lgbasallote
yup
anonymous
  • anonymous
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)
anonymous
  • anonymous
where do i start with that
lgbasallote
  • lgbasallote
find (h o g) x first
vishweshshrimali5
  • vishweshshrimali5
sorry to interrupt but Prefer this link .. for understanding ; http://www.regentsprep.org/Regents/math/algtrig/ATP7/compositionfunctions.htm
vishweshshrimali5
  • vishweshshrimali5
see the examples. . you may continue @lgbasallote
anonymous
  • anonymous
this may help, in helping me
1 Attachment
anonymous
  • anonymous
wait, how do i find (hog)?
lgbasallote
  • lgbasallote
find g(x) first
lgbasallote
  • lgbasallote
what is g(x)
anonymous
  • anonymous
what do i use for x?
lgbasallote
  • lgbasallote
x
anonymous
  • anonymous
isnt it just 4x^3+20 then?
lgbasallote
  • lgbasallote
yup
lgbasallote
  • lgbasallote
so therefore h(4x^3 + 20) = f(x) do you agree with this?
anonymous
  • anonymous
yes
anonymous
  • anonymous
where do i use that?
lgbasallote
  • lgbasallote
hmm this was easier in my head...
anonymous
  • anonymous
lol
lgbasallote
  • lgbasallote
how will you turn h(4x^3 + 20) into h(x) what do you think?
anonymous
  • anonymous
geeze, I have no clue.
lgbasallote
  • lgbasallote
me neither :/
lgbasallote
  • lgbasallote
try posting it as a new question maybe someone has an idea

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