1.

Let f(x) = ( x-4) (x -5) ( x-6 ) ( x- 7 ) then

Answer»

f (x) = 0 has four roots
three roots of f(x) = 0lie in (4,5) U ( 5,6) U ( 6,7)
the EQUATION f(x) = 0 has only one root.
three roots of f(x) = 0 LIE in (3,4) U ( 4,5) U ( 5,6)

ANSWER :B


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