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3+2+7+2x+8=6×5∴x=5方差=1/5[(3-6)²;+(2-6)²;+(7-6)²;+(10-6)²;+(8-6)²;] =1/5(9+16+1+16+4)=46/5明教為您解答,如若滿意,請點擊[滿意答案];如若您有不滿意之處,請指出,我一定…
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