![](https://rs.olm.vn/images/avt/0.png?1311)
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{9\cdot8\cdot33}{56\cdot54\cdot11}=\frac{9\cdot8\cdot3\cdot11}{8\cdot7\cdot9\cdot3\cdot2\cdot11}=\frac{1}{7\cdot2}=\frac{1}{14}\)
\(\frac{8\cdot15+16\cdot4-8\cdot21}{16\cdot5-8\cdot9}=\frac{8\cdot15+8\cdot2\cdot4-8\cdot21}{2\cdot8\cdot5-8\cdot9}=\frac{8\cdot15+8\cdot8-8\cdot21}{8\cdot10-8\cdot9}=\frac{8\left(15+8-21\right)}{8\left(10-9\right)}=\frac{8\cdot2}{8\cdot1}=\frac{2}{1}=2\)
![](https://rs.olm.vn/images/avt/0.png?1311)
x trên vô nghiệm nhé
nếu 1x23 + 8x7 mà lại = 6x thì
vô nghiệm
yêu cầu chỉnh đề
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{2011x2011x20102010-2010x2010x20112011}{2011x2010x20092009}\)
\(=\frac{2011x2011x2010x10001-2010x2010x2011x10001}{2011x2010x2009x10001}\)
\(=\frac{2011x2010x10001\left(2011-2010\right)}{2011x2010x2009x10001}\)
\(=\frac{2011x2010x10001}{2011x2010x2009x10001}\)
= 1/2009
![](https://rs.olm.vn/images/avt/0.png?1311)
1x23 + 8x7 + 6x = 200x
Ta có :
1023 + x . 100 + 807 + x.10 + 60 + x = 200x
( 1023 + 807 + 60 ) + xxx = 2000 + x
1890 + xx . 10 = 2000
xx . 10 = 2000 - 1890 = 110
xx = 110 : 10
xx = 11
=> x = 1
Lưu ý : . là nhân nhé
1x23+8x7+6x=200x
(1023+x*100)+(807+x*10)+(60+x)=2000+x
(1023+807+60)+(x*100+x*10+x)=2000+x
1890+x*111=2000+x
1890+x*110=2000
x*110=2000-1890=110
x=110/110
=>x=1
![](https://rs.olm.vn/images/avt/0.png?1311)
1 1/5 x 1 1/6 x 1 1/7 x ... x 1 1/2006
= 6/5 x 7/6 x 8/7 x ... 2007/2006
= 1/5 x 1/2006
= 1/10030
Mình ko chắc đâu bạn! Nhưng mình vẫn chúc bạn hok tốt nha!
Bạn Crystal ơi, làm thế nào mà bạn ra được \(\frac{1}{5}\)vậy ạ?
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{2006\times125+100}{125\times200-880}=\frac{250850}{24120}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{1}{1.2}+\frac{1}{2.3}+\frac{1}{3.4}+...+\frac{1}{999.1000}+1\)
\(=1-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+\frac{1}{3}-\frac{1}{4}+...+\frac{1}{999}-\frac{1}{1000}+1\)
\(=1-\frac{1}{1000}+1\)
\(=\frac{1000}{1000}-\frac{1}{1000}+\frac{1000}{1000}\)
\(=\frac{1999}{1000}\)
Tham khảo nhé~
\(\frac{8x15+16x4-8x21}{16x5-8x7}\)
\(\Rightarrow=\frac{120+64-168}{80-56}=\frac{16}{24}=\frac{2}{3}\)
Ủng hộ đi nhen
\(\frac{8\times25+16\times4-8\times21}{16\times5-8\times7}\)
\(\Rightarrow\frac{120+64-168}{80-56}\)
\(\Rightarrow\frac{16}{24}=\frac{2}{3}\)