1一o.99+o.98…十o.o1=?
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1一o.99+o.98…十o.o1=?=(1-0.99)+(0.98-0.97)……+(0.02-0.1)=0.01+0.01……+0.01=50x0.01=0.5
咨询记录 · 回答于2023-03-22
1一o.99+o.98…十o.o1=?
1一o.99+o.98…十o.o1=?=(1-0.99)+(0.98-0.97)……+(0.02-0.1)=0.01+0.01……+0.01=50x0.01=0.5
1一o.99+o.98…十o.o1=0.5
1一o.99+o.98…十o.o1=?找规律,再通项整理=(1-0.99)+(0.98-0.97)……+(0.02-0.1)=0.01+0.01……+0.01=50x0.01=0.5
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1一0.99—0.98—0.96—0.95一0.94十0.93+…十0.01=?
1一0.99—0.98—0.96—0.95=-1.9
:此题怎么做
问题错
0.94十0.93+…十0.01=94x(0.94+0.01)/2=44.65
1一0.99—0.98—0.96—0.95一0.94十0.93+…十0.01=-1.9+44.65=42.75
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