SOLUTION: Given f(x)=2x+3 and g(x)=x^2-3x+4 find following: 1. f(3) 2. g(-2) 3. f(b) 4. g(a+3) 5. (f+g)(x) Thank you!

Algebra ->  Functions -> SOLUTION: Given f(x)=2x+3 and g(x)=x^2-3x+4 find following: 1. f(3) 2. g(-2) 3. f(b) 4. g(a+3) 5. (f+g)(x) Thank you!      Log On


   

Question 203212: Given f(x)=2x+3 and g(x)=x^2-3x+4
find following:
1. f(3)
2. g(-2)
3. f(b)
4. g(a+3)
5. (f+g)(x)
Thank you!
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


and are functions, the notation and mean "the value of the function (or ) at ".

So if then , that is, the value of the function at 1. , the value of the function at , and so on. You just substitute the given value, whatever it is, for the independent variable in the function definition.

Finally, . You just need to simplify the new expression.

John