Let g(x)=6x²-18x +8, F₁(x) = g(x), F₂(x)=F/₁(x)=F₁l. -P2, P₁ = 7, then the range of P, such that f(x) has exactly 10 points of

Question

Let g(x)=6x²-18x +8, F₁(x) = g(x), F₂(x)=F/₁(x)=F₁l. -P2, P₁ = 7, then the range of P, such that f(x) has exactly 10 points of non-differentiabili is;
(a) (1,5,7)
(B) [2, 5, 8]
(c) [2,9]
(d) (1,8)

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