Q. 21 A5.0( 1 Vote )

Let A = [–1, 1].

Answer :

Given that, A = [–1, 1]



Let f(x1) = f(x2)



2x1 = 2x2


x1 = x2


f is one one


Now, let f(x) = y



2y= x


for y=1 A we will have x = 2 A


f is not onto


Thus, f is one-one and not onto.


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