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Mubi
 3 years ago
A curve has equation y= x^3+ 3x^2 9x+k, where k is a constant.
1/ write down an expression for dy/dx
2/ find the xcoordinates of the two stationary points on the curve.
3/ hence find the two values of k for which the curve has stationary point on the xaxis.
Mubi
 3 years ago
A curve has equation y= x^3+ 3x^2 9x+k, where k is a constant. 1/ write down an expression for dy/dx 2/ find the xcoordinates of the two stationary points on the curve. 3/ hence find the two values of k for which the curve has stationary point on the xaxis.

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calculusfunctions
 3 years ago
Best ResponseYou've already chosen the best response.0I'm sure you know the power rule for derivatives. Right? So is there something specific about the problem that's perhaps troubling you?

Mubi
 3 years ago
Best ResponseYou've already chosen the best response.0Is the answer for no 1/ (1/4)x^4+x^3(9/2)x^2+k
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