Page 51 - Math SL HB Sem 1

FT.JNC'TI0NS , EQTJATI 0NS, INEQtL\LII'tES

I :xantnlc l
I
Irir:.1 l"/ rts rarrlr. rircn ll);rl .(t.\ ) . r, g t\l
{tl , ) and ./(-r) = 2',-r € R (use
( ir)c)

2. IDEN'III-Y FTJN(]TION

Wc tlefined rhc identiry, / . as

If'an iclentity function' /cxists rhcn,,,rrr., nl?*Jprope(y
thatforanygiven lunction

0r ( f,,r)(x) = (r.f)(x) = f (x)

t5