Posted by **XCS** on Friday, May 8, 2009 at 9:16am.

I need help setting up this problem:

A particle moves along the curve

y=sqr(1+x^3). As it reaches the point (2,3) the y-cordinate is increasing at a rate of 4cm/s. How fast is the x-coordinate of the point changing at that instant.

I could only come up with this:

dy/dx=4

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