Application of DerivativeMedium
Question
Let f(x) = (x - 4) (x - 5) (x - 6) (x - 7) then -
Options
A.f′(x) = 0 has four roots
B.Three roots of f′(x) = 0 lie in (4, 5) υ (5, 6) υ (6, 7)
C.The equation f′(x) = 0 has only one root
D.Three roots of f′(x) = 0 lie in (3, 4) υ (4, 5) υ (5, 6)
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