GiggleSquid
If f(x)=4x+7 and g(x)= sqrt(x3), what is (fog)(4)



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

lgbasallote
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lol bribing?

GiggleSquid
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well, just want people to double check there answer

lgbasallote
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well what's your answer

GiggleSquid
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lemme do it

lgbasallote
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tag me when you have an answer

GiggleSquid
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\[\sqrt{233}\]
4.4721
but thats not right.

GiggleSquid
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@lgbasallote

lgbasallote
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solve for g(4) first

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

GiggleSquid
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ahhh, so 11

lgbasallote
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yup

GiggleSquid
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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)

GiggleSquid
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where do i start with that

lgbasallote
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find (h o g) x first


vishweshshrimali5
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see the examples. .
you may continue @lgbasallote

GiggleSquid
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this may help, in helping me

GiggleSquid
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wait, how do i find (hog)?

lgbasallote
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find g(x) first

lgbasallote
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what is g(x)

GiggleSquid
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what do i use for x?

lgbasallote
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x

GiggleSquid
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isnt it just 4x^3+20 then?

lgbasallote
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yup

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

GiggleSquid
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yes

GiggleSquid
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where do i use that?

lgbasallote
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hmm this was easier in my head...

GiggleSquid
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lol

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

GiggleSquid
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geeze, I have no clue.

lgbasallote
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me neither :/

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