SOLUTION: f(x)=3x^2-x+4
find
f(2)
f(2x)
f(x+2)
Algebra.Com
Question 201727: f(x)=3x^2-x+4
find
f(2)
f(2x)
f(x+2)
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
Let's start with an understanding of the meaning of the various parts of the notation. 
is the function, whereas )
is the value of the function at 
. That means anytime you see f(something), it means the value of the function at that something. In other words, you simply replace in the definition of with the something in f(something). So:
\ =\ 3(2x)^2 - (2x) + 4\ =\ 12x^2 - 2x + 4)
Do the other two problems the same way.
John
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