livelaughlilz
f(x)=2x1and g(x)=sqrt(x), find g(f(x))



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anonymous
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\[g(f(x))=g(2x1)=\sqrt{2x1}\]

livelaughlilz
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@satellite73 why is g(2x1) sqrt(2x1) instead of 2*sqrt(x)1?

hba
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@livelaughlilz You have to substitute the value of
\[f(x)=2x1\]
In place of
x
in
\[g(x)=\sqrt(x)\]

livelaughlilz
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oh so the "x" becomes "2x1"

hba
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Exactly :)

livelaughlilz
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thanks