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chua kok tong Grade: Upto college level
        

if the area of an object is define as A=5xy^2-9yx given x and y are variable how do we find the combination of x and y that will give the maximum or minimum value(if it does have a maximum or minimum point)

7 years ago

Answers : (2)

Chetan Mandayam Nayakar
312 Points
										

∂A/∂x=∂A/∂y=0,let 'delta'=(∂2A /∂x2)(∂2A/∂y2)-∂2A/∂x∂y,if delta>0 and ∂2A /∂x2 and ∂2A /∂y2 are both less than zero, it is a maximum, if both are greater than zero, it is a minimum

7 years ago
chua kok tong
29 Points
										

hmm, so what is the coordinate of the point

7 years ago
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