Functions review

Page 1

quadratic: y=x^2

Function notation

If F is a function y=x^2+1

f(x)=x^2+1

f of x

x is the independent value

f(x) is the dependent value

the brackets do not mean multiplication, you cannot add f(1)+f(2) as f(1+2), you need to add their answers, 5+1=6

if f(1)=1^2+1

f(2)= 2^2+1=5

f(3)=3^2+1=10

d(t) might mean distance as a function of time

Page 23, 4,5,6

4.

Set notation

-we will use for describing domain and range

﹛XER}

E=Is a member of

R= Set of real number

X= Any real number

{XER│≥ 2}

{XER│x≤ -1x≥1}

Z=set of integers

Page 2

RANGE CANNOT REPEAT, RANGE ARE THE Y VALUES, DOMAIN ARE ALL THE X VALUES, SO LIST THEM BUT FOR POINTS ON A GRAPH THAT GO ON FOREVER YOU NEED TO USE {XER│

page 35 1-3

1.a) range=100 b) range=8 -5,15