Find the maximum rate of change
Find the maximum rate of change of the function f(x,y) = (3 y^5)/x at the point (1,2)
First I took the gradient of f(x,y)=<3y^5*x^2,15y^4*x^1> and took the pt <1/sqrt(5),2/sqrt(5)> Then <3y^5*x^2,15y^4*x^1>*<1/sqrt(5),2/sqrt(5)> the answer i get is 171.73 I'm not sure where my error is 
Re: Find the maximum rate of change
Quote:

Re: Find the maximum rate of change
Sorry I evaluated at the gradient(1,2)=<96,240> and then <96,240>*<1/sqrt(5),2/sqrt(5)>

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