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6. Suppose that w(x, y) = xev + x2, x(t) = 12, y(t) = et. (a) Find Wir, Wyy as functions of x, y. (b)

6. Suppose that w(x, y) = xev + x2, x(t) = 12, y(t) = et. (a) Find Wir, Wyy as functions of x, y. (b) Find du at t = 1 by chain rule

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