Determine the slope of the tangent line to the function with the given information: (a) f(x, y) = sin(xy) in direction 2î + ĵ at the point (1, 7) 1+x (b) f(x, y) moving directly away from the origin, at the point (4,1). = (c) f(r, y) = 2x + 7y – 1 in the direction 30° counter-clockwise from the negative y-axis, at the point (2,2).

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