Question: Consider the function f(x, y) = e-23+4y?. (a) Draw a contour map of f, showing all types of level curves that occur. (b) Find the

Consider the function f(x, y) = e-23+4y?. (a) Draw a "contour map" of f, showing all types of level curves that occur. (b) Find the equation of the tangent plane to the graph z = f(x, y) at the point where (z, y) = (2, 1). (c) Find the tangent plane approximation to the value of f(1.99, 1.01) using the tangent plane from part (b)
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