1.Relation and Function
medium

સાબિત કરો કે $f: R \rightarrow R$, $f(x)=x^{2},$ દ્વારા વ્યાખ્યાયિત વિધેય એક-એક પણ નથી અને વ્યાપ્ત પણ નથી. 

Option A
Option B
Option C
Option D

Solution

since $f(-1)=1=f(1), \,f$ is not oneone. Also, the element $-2$ in the co-domain $R$ is not image of any element $x$ in the domain $R$ (Why ?). Therefore $f$ is not onto.

Standard 12
Mathematics

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