R given by
f(x) = 4x +| 3. Show that f is invertible. Find the inverse of f.
Answer:
Given f(x) = 4x + 3, Df
=
Injectivity :
Let x1, x2 be any two elements of R
is one-one.
Surjectivity:
Let 
then y = f(x)
Corresponding
to each element y of R, there exists a unique element 
of R such
that 
is onto.
is one-one
and onto function.
exists.
To find inverse of f :
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