I don’t think I have seen shorter proof of Cauchy-Schwarz Inequality than the following

which immediately gives

from which CS inequality follows.

Source: Mathematics Magazine, Vol. 68, No. 2 (Apr., 1995), p. 97

I don’t think I have seen shorter proof of Cauchy-Schwarz Inequality than the following

which immediately gives

from which CS inequality follows.

Source: Mathematics Magazine, Vol. 68, No. 2 (Apr., 1995), p. 97

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