absolute value( [tex]\int{fg}[/tex]) [tex]\leq[/tex][([tex]\int{f}[/tex][tex]^{2}[/tex])([tex]\int{g}[/tex][tex]^{2}[/tex])][tex]^{1/2}[/tex](adsbygoogle = window.adsbygoogle || []).push({});

all integrals are from a to b

does anyone have any idea of a proof for this?

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# Cauchy-Bunyakovsky-Schwarz inequality

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