Question 305452: Can someone please explain how to do this type of problem. Im putting two examples of the problems im trying to solve and my book doesnt explain them well
Find f(0) when f(x) = 3x^2 - 11x
Find f(0) when f(x) = 83
Found 2 solutions by Fombitz, solver91311:
Answer by Fombitz(32388)   (Show Source):
Answer by solver91311(24713)  (Show Source):
You can put this solution on YOUR website!
Any time you are given ) (or ) or ) or ) for that matter) and a definition of the function as an expression involving  , then you need to read it as "the value of the function  at is: "
So if the value of the function at is  , then the value of the function at  is ^2\ -\ 11(0)\ =\ 0) .
Whatever is in the parentheses replaces in the function definition -- then do the appropriate arithmetic.
Also:
If \ =\ 3x^2\ -\ 11x) , then \ =\ 3a^2\ -\ 11a) , or \ =\ 3(x+h)^2\ -\ 11(x+h)) , or, if \ =\ x^2\ -\ 3) , then )\ =\ 3(g(x))^2\ -\ 11(g(x))\ =\ 3(x^2-3)^2\ -\ 11(x^2-3))
Your other problem says that the value of the function at is 83 no matter what the value of might be. So, \ =\ 83) means that \ =\ 83) , \ =\ 83) , and \ =\ 83)
John
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