X 7

X 4 many to many4 mapping

I to l

P Q mapping

4 p Q

Iii

A function must be a l Eo l or a

many to 1 mapping

Examples f i IR Rt u o

Mappings

f x of many to 1

f z a mapping

f C 2 4

f IIR IRl to l

f x of mapping

There are useful relationships which are

not functions many tomany2F xd ty i 4 PP'S

2

CompositefunctionsLet fix x

g Cx Xtc

h x 2x

fg fgcse fatal octal

gfGe g x x't 4

g ht ghfGc g4Cx g 2 2 2 2 4

Exercise Foil

1 hg hg x L ate 26 4

z gfh gfkc.es gf 2x glam 424

3 hhg hhgCx hhlata h 2Cxta 4kt

Exercise 2C Page 34 Blue Textbook

1 Pca I 3x qca I rCx Coc 25

a pqC 8 PC 2 I 3C 2

or pg.CH p Ia I

pqC 8 I 348 I 2 7Do Q

Homework Exercise 2C 3 Qiobut not Q5