Explain one to one function and bijective function .

Explain one to one function and bijective function . A • and to
ve One - and Onto). If a
one-to-one and onto. then f is said 10 a bijec-
rive For example an i&nt'ty function i, A A
by i, = is trivially a Njective function The
function f; I-e. zf21 I-I. II defined by sin
is • bijective functiorv The function f: R
*6md by tM x is also a bl'ecuve function.
If A and B are finite sets and f: A —i B is a bijecti(H1 then
z n/ B If = n. then the nurr&rof from
A to B the total nurntrr of arrangenrnts of n iLems taken
an at a time which is n!
grap