stephwit stephwit

20-08-2021
Mathematics

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7x (x+y)-2 plss help

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thanhthien0332885599 thanhthien0332885599

20-08-2021

Hình thức thay thế :

7 x^2 + 7 x y - 2

7/4 (2 x + y)^2 + 1/4 (-7 y^2 - 8)

x (7 x + 7 y) - 2

Dẫn 1 phần :

d/dx(7 x (x + y) - 2) = 7 (2 x + y)

d/dy(7 x (x + y) - 2) = 7 x

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