tacamry

If f(x) = 1/2 x + 2 and g(x) = −3x − 1, find g[f(4)].
−19
11
−13
−11

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KingGeorge

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If you're given something like g[f(x)], that means that you want to find f(x), and take that value, and plug into to g. For example:
g[f(0)]:
Since \(\displaystyle f(0)=\frac{1}{2}(0)+2=2 \) \( g[f(0)]=g(2)=-3(2)-1=-7\).
Now can you do this with 4 instead of 0?

tacamry

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so iht would be -11

KingGeorge

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You're very close. You have f(4)=4 correct?

tacamry

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i got it -13

KingGeorge

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Bingo.

tacamry

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thanx

KingGeorge

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you're welcome.

tacamry

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can yhu help with one other question to?