Let and . A function is defined by , , . Is onto? Give a brief reason for your…

MATHEMATICS · Subjective · CBSE · Mathematics · Relations and Functions · Relations and Functions

Problem

Let

A=\{1,2,3\}

and

B=\{a,b\}

. A function

f:A\to B

is defined by

f(1)=a

f(2)=b

f(3)=b

. Is

f

onto? Give a brief reason for your answer.