Recent content by freecw

Thanks, i just went back and checked the back of the book, the answer is supposed to be -8*sqrt(2) not -8/sqrt(2). Also i didn't notice that -16/sqrt(2) is the same thing as -8*sqrt(2). Thanks for the help.

Homework Statement Find the directional derivative of f at P in the direction of a. f(x,y)=y2lnx; P(1,4); a= -3i + 3j Homework Equations The Attempt at a Solution I first normalized the vector and got an = -3/(18)^1/2 + 3/(18)^1/2 Then i took the partial derivative and multiplied...