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Question

Let f(x)=(x−4)(x−5)(x−6)(x−7) then

A
f(x)=0 has four roots
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B
three roots of f(x)=0 lie in (4,5)(5,6)(6,7)
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C
The equation f(x)=0 has only one root
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D
three roots of f(x)=0 lie in (3,4)(4,5)(5,6)
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