2x+7/6+13/12+21/20+31/30+43/42+57/56+73/72+91/90=10
2x+1+1/6+1+1/12+1+1/20+1+1/30+1+1/42+1+1/56+1+1/72+1+1/90=10
2x+(1+1+1+1+1+1+1+1)+(1/2.3+1/3.4+1/4.5+1/5.6+1/6.7+1/7.8+1/8.9+1/9.10)=10
2x+8+(1-1/2+1/2-1/3+...+1/9-1/10)=10
2x+1-1/10=10-8
2x+9/10=2
2x=2-9/10
2x=11/10
x=11/10/2
x=11/20
Tìm x , biết :
b> 2x + 7/6 + 13/12 + 21/20 + 31/30 + 43/42 + 57/56 + 73/72 + 91/90 = 10
TÌm x biết : 2x +7/6+13/12+21/20+31/30+43/42+57/56+73/72+91/90 = 0
Tìm x : \(2x+\frac{7}{6}+\frac{13}{12}+\frac{21}{20}+\frac{31}{30}+\frac{43}{42}+\frac{57}{56}+\frac{73}{72}+\frac{91}{90}=10\)10
1.Tìm x, biết: x+13/12+21/20+31/30+43/42+57/56+73/72+91/90=277/30
tìm x biết \(2x+\frac{7}{6}+\frac{13}{12}+\frac{21}{20}+\frac{31}{30}+\frac{43}{42}+\frac{57}{56}+\frac{73}{72}+\frac{91}{90}=10\)
Tìm y biết: 2x+7/6+13/12+21/20+31/30+43/42+57/56+73/72+91/90=10. Bạn nào giải hộ mình nhanh với, mình cần gấp
Tìm x,y biết:
a) 1/5.8+1/8.11+1/11.14+...+1/y(y+3).=98/1545
b) 2x+7/6+13/12+21/20+31/30+43/42+57/56+73/72+91/90 = 0
Tính nhanh:3/2+7/6+13/12+21/20+31/30+43/42+57/56+73/72
giải gúp tôi bài này với x+13/12+21/20+31/30+43/42+57/56+73/72+91/90
ai làm được tôi sẽ tích thật nhiều cho