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Mathematics, 18.06.2021 08:40 myla18jabbar

Cho hàm số f (x, y)= \frac{2x^{2} +y^{2} }{xy} a) Tính vi phân cấp 1 của hàm số tại
b) Tính các đạo hàm riêng cấp 2 của hàm số tại
c) Chứng minh rằng không tồn tại \lim_{(x,y) \to \ (0,0)} f (x,y)

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Cho hàm số f (x, y)= a) Tính vi phân cấp 1 của hàm số tại
b) Tính các đạo hàm riêng cấp 2 c...
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