如题所述
ï¼
åå¼=ï¼-2/3ï¼+ï¼1/4ï¼-ï¼1/6ï¼-ï¼1/2ï¼ =ï¼-8/12ï¼+ï¼3/12ï¼-ï¼2/12ï¼-ï¼6/12ï¼ =ï¼-8+3-2-6ï¼/12 = -13/12 åå¼=-8-ï¼7/2ï¼+2-ï¼1/2ï¼+12 =6-4 =2 åå¼=-3.75+2.75 =-1 åå¼=ï¼-2/3ï¼+1.75-ï¼1/3ï¼-1.75 =-1 åå¼=ï¼-3å2/3ï¼+2.75+ï¼1å2/3ï¼ã
åå¼=ï¼-2/3ï¼+ï¼1/4ï¼-ï¼1/6ï¼-ï¼1/2ï¼ =ï¼-8/12ï¼+ï¼3/12ï¼-ï¼2/12ï¼-ï¼6/12ï¼ =ï¼-8+3-2-6ï¼/12 = -13/12 åå¼=-8-ï¼7/2ï¼+2-ï¼1/2ï¼+12 =6-4 =2 åå¼=-3.75+2.75 =-1 åå¼=ï¼-2/3ï¼+1.75-ï¼1/3ï¼-1.75 =-1 åå¼=ï¼-3å2/3ï¼+2.75+ï¼1å2/3ï¼ã
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