Question: 3. [4pts] Show that the function f (x, y) = x2 - 2x + y is differentiable by finding values of 6, and E2, and

3. [4pts] Show that the function f (x, y) = x2 - 2x + y is differentiable by finding values of 6, and E2, and verify that 61 - 0, 62 - 0 as (A x,A y) - (0,0). 4. [4pts] Suppose f(x,y) = x2 + 4xy + y2 - 4x + 16y + 5. Find all values of x and y such that fx(x, y) = 0 and fy(x, y) = 0, simultaneously

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