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) ∪ (5, 6) ∪ (6, 7)
C.The equation f′(x) = 0 has only one root
D.Three roots of f′(x) = 0 lie in (3, 4) ∪ (4, 5) ∪ (5, 6).
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