Q. 7 A4.3( 45 Votes )

# In each of the fo

Answer :

It is given that f : R → R defined by f (x) = 3 – 4x

Let x_{1}, x_{2}ϵ R such that f(x_{1}) = f(x_{2})

⇒ 3 – 4x_{1} = 3 – 4x_{2}

⇒ -4x_{1} = -4x_{2}

⇒ x_{1} = x_{2}

⇒ f is one- one

For any real number (y) in R, there exist in R such that

⇒ f is onto.

Therefore, function f is bijective.

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