
Step-by-step solution-:
f(\textcolor{primary}{x})=2\textcolor{primary}{x}
Substitute the g(x) instead of x into the above expression:
Now,
If f(x)=2x and g(x)=5x What is f(g(x)) when x=3?.
f(g(x))=2g(x)
Substitute the g(x)=5x on the right-hand side into the above expression:
f(g(x))=2(5x)
After simplifying we get,
f(g(x))=10x
Substitute the x=3 into the above expression:
f(g(3))=10\times3
After simplifying we get,
f(g(3))=30
The value of f(g(3)) is 30.
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