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Let fxy xy6 3f x y xSolutionfxy xy6 Hence dfdx 6xy5 d2fdx

Let f(x,y)= (-(x+y))^6



3f / x y x

Solution

f(x,y) = (x+y)6
Hence df/dx = 6(x+y)5
 d2f/dxdy = 30(x+y)4
d3f/dxdydx = 120(x+y)3

Let f(x,y)= (-(x+y))^6 3f / x y xSolutionf(x,y) = (x+y)6 Hence df/dx = 6(x+y)5 d2f/dxdy = 30(x+y)4d3f/dxdydx = 120(x+y)3

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