SOLUTION: Pls help. In what point of the graph of f(x) = 2x^3 -6x has/have its horizontal tangent line? Thankyou.

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Question 1112000: Pls help. In what point of the graph of f(x) = 2x^3 -6x has/have its horizontal tangent line? Thankyou.
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
In what point of the graph of f(x) = 2x^3 -6x has/have its horizontal tangent line?
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Where the 1st derivative = zero.