A. Σu1=1 ƒ ixi2
B. Σni-1 ƒ ixi2
C. Σpi=1 ƒ ixi2
D. Σmi=1 ƒ ixi2
Correct Answer: Σu1=1 ƒ ixi2 ✔
Last Updated: October 05, 2021
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