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elica85

  • 4 years ago

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

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  1. elica85
    • 4 years ago
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    df/dx=12x-6x^2+6y df/dy=6y+6x next step is to find critical points

  2. elica85
    • 4 years ago
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    set df/dy=0 and y=-x i'm stuck on df/dx=0...

  3. imranmeah91
    • 4 years ago
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    don't you need second derivative?

  4. elica85
    • 4 years ago
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    o wait, nevermind i use y=-x in setting df/dx=0 i think i can get it now (slapping forehead)

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