### Optimization on Ellipse in R^3 2: Lagrange Multipliers with Two Constraints

Multivariable Calculus: We find the maximum and minimum values of the function f(x,y,z) = xz on the intersection of the cylinder x^2 + y^2 = 1 and the plane z=y-1 in R^3. In this part, we use the method of Lagrange multipliers with two constrains.

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