Question: Show that for is a convex function. S = R, f(x1, x2, x3) = x + x + 2x-xx-xx X1X3

Show that for S = R, f(x1, x2, x3) = x + x + 2x-xx-xx

is a convex function.

S = R, f(x1, x2, x3) = x + x + 2x-xx-xx X1X3

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