Kaitlyn's blogggg

In this blogg, i will go over section 4-2. This section deals with notation. It was pretty easy for me because all you have to do is solve equations.

f(x) means notation. If you replace the x with a number, then you plug that number into the x values in the equation that follows it.

Sometime you have two different sets of equations that you might have to either add, subtract, multiply, or divide together: 1) (f+g)(x)
2) (f-g)(x)
3) (fxg)(x)
4) (f/g)(x)

Sometimes the functions will have to be put inside other functions: 1) f(g(x))
2) g(f(x))

Examples: f(x)=2x+4 find f(5)
-f(5)=2(5)+4
- f(5)=10+4
-f(5)=14 <---answerrrrr

Examples: f(x)=x+1 g(x)=2x-1 find (f+g)(x)
-(x+1)+(2x-1)
-(3x) <---answerrr

Examples: f(x)=x-1 g(x)=x^2+5 find g(f(x))
-(x-1)^2+5
-x^2-2x+1+5
-x^2-2x+6 <---answerrrr