Question: Consider the following function: Show that f (x) is convex by expressing it as a sum of functions of one or two variables and then

Consider the following function:

Show that f (x) is convex by expressing it as a sum of functions of one or two variables and then showing (see Appendix 2) that all these functions are convex.

fix) = 5x1 + 2x, + x2-3x3x4 +4G+24+ +3x96 + 6x6 + 3x6x7 + .

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