Let f(x) = e^(x+y+3z
a.) Find the directional derivative at P(-2,2,-1) in the direction of Q(18,-2,4)
b.) Find the direction of maximum decrease at P. (your answer does not have to be unit vector.) What is the maximum rate of decrease?© BrainMass Inc. brainmass.com December 20, 2018, 4:04 am ad1c9bdddf
The direction derivative is expressed. The direction of maximum decrease at P are determined.