f1x12 + f2x22 + —————+ fxx42=___________? – McqOptions

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1.	f1x12 + f2x22 + —————+ fxx42=___________?
A.	Σu1=1 ƒ ixi2
B.	Σni-1 ƒ ixi2
C.	Σpi=1 ƒ ixi2
D.	Σmi=1 ƒ ixi2
Answer» B. Σni-1 ƒ ixi2

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