(B): use the directional derivative to estimate how much f(x, y) = cos(xy) + xy² Will change if the point p(x, y) is moved from (-1,-1) a distance of As = 0.1 unit along the vector A = i + j. C): Consider the graph y=² polynomial. on ( x₁ = 2₁x₁ = 2.4, x₂ = 4) to find the linear interpolation

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