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Cho f(x, y) = x cos(xy). Tính f”xy(π2, −1)
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Cho f(x, y) = x cos(xy). Tính f”xy(π2, −1)

User Deepak Mallah
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1 Answer

5 votes

because the cos(xu

y) so the formula have to be cos

User Nick Kugaevsky
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