Consider the curve y=x^3-9x^2+15x+9
a) find dy/dx , and hence find the range of x such that dy/dx<=0
b)Find the turning points of the curve and test whether it is max. or min. pt.
c)sketch the graph in the stated range in (a) ,
hence show , in a separate, the shape of the curve y^2=x^3-9x^2+15x+9
And you can just anwer the question in part c) only.thx=]
application of differentiation
2007-07-16 3:08 am
回答 (2)
2007-07-16 3:29 am
✔ 最佳答案
As follows:圖片參考：http://i117.photobucket.com/albums/o61/billy_hywung/Jul07/Crazydiff7.jpg
圖片參考：http://i117.photobucket.com/albums/o61/billy_hywung/Jul07/Crazydiff8.jpg
參考: My Maths knowledge
2007-07-20 4:23 am
You didn't show how to arrive at the second graph.
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