Question: 42. (i) A function L satisfies the first equation of (62) for all u, x, and orthogonal transformations Q if and only if it depends

42. (i) A function L satisfies the first equation of (62) for all u, x, and orthogonal transformations Q if and only if it depends on u and x only through u'x, x'x, and u'u. (ii)

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