warpedkitten
  • warpedkitten
If f(x) = √x + 12 and g(x) = 2 √x, what is the value of (f-g)(144)?
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
\[f(x)=\sqrt{x}+12\] what is \[f(144)=\sqrt{144}+12\]?
anonymous
  • anonymous
similarly, what is \[g(144)=2\sqrt{144}\]?
warpedkitten
  • warpedkitten
No idea how to do that... @satellite73

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anonymous
  • anonymous
do you know what the square root of 144 is? that is what you need
warpedkitten
  • warpedkitten
12?
anonymous
  • anonymous
not 12? but rather 12 !!
anonymous
  • anonymous
that makes \[f(144)=\sqrt{144}+12=12+12=?\]
SolomonZelman
  • SolomonZelman
satellite73, don't you first subtract g(x) from the f(x) and then plug in 144 for x?
anonymous
  • anonymous
you can but no need right? \[f-g(144)=f(144)-g(144)\] i would compute each number, then subtract
anonymous
  • anonymous
we have \[f(144)=24\] all we need is \(g(144)\)
SolomonZelman
  • SolomonZelman
Alright, not typical but actually hadier in a way. Sorry for bugging then:)
anonymous
  • anonymous
what number is \[g(144)=2\sqrt{144}\]?

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