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use the second derivative test to find local extrema and saddle point of f(x,y)=6x^22x^3+3y^2+6xy
 2 years ago
 2 years ago
use the second derivative test to find local extrema and saddle point of f(x,y)=6x^22x^3+3y^2+6xy
 2 years ago
 2 years ago

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elica85Best ResponseYou've already chosen the best response.2
df/dx=12x6x^2+6y df/dy=6y+6x next step is to find critical points
 2 years ago

elica85Best ResponseYou've already chosen the best response.2
set df/dy=0 and y=x i'm stuck on df/dx=0...
 2 years ago

imranmeah91Best ResponseYou've already chosen the best response.0
don't you need second derivative?
 2 years ago

elica85Best ResponseYou've already chosen the best response.2
o wait, nevermind i use y=x in setting df/dx=0 i think i can get it now (slapping forehead)
 2 years ago
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