Answer:
(x)
= x2 ? 4x ? 3
(i)
f(x) is a polynomial function.
(ii)
is
continuous n [1, 4]
(iii)
f?(x) exists uniquely in (1, 4)
is derivable
in (1, 4).
Since
f(x) satisfies both conditions of L.M.V. theorem, therefore there exists at
least one 
such that
Hence
the theorem is verified.
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