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2 votes
If f(x)=3x and g(x)= x + 4

f[g(1)]

Please help I don’t know how to do the formula. Please just teach me the steps.

User Kaasdude
by
8.3k points

2 Answers

5 votes

Answer:

f[g(1)]= 15

Explanation:

f(x)=3x

g(x)=x+4

so you are asked to find fof(g(1))

you first find g(1)= 1+4=5

now you substitute it into f(g(1))

so you now have f(5)

f(5)= 3×5=15

User Kumod Singh
by
8.0k points
4 votes

Answer:


f(g(1))=15

Explanation:


f(x)=3x\\g(x)=x+4\\f(g(1))

First, you need to evaluate
g(1):


g(1)=(1)+4\\g(1)=5

Now, you plug this into
f(x) and evaluate
f(5):


f(5)=3(5)\\f(5)=15

Now you know
f(g(1))=15.

User Raychel
by
8.5k points

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