\(\frac{2011}{2010}\times\frac{2012}{2011}\times\frac{2013}{2012}\times\frac{2014}{2013}\times\frac{1005}{1007}\)

\(=\frac{2014}{2010}\times\frac{1005}{1007}\)

\(=\frac{2\times1007\times1005}{2\times1005\times1007}\)

\(=1\)

\(\frac{2011}{2010}\cdot\frac{2012}{2011}\cdot\frac{2013}{2012}\cdot\frac{2014}{2013}\cdot\frac{2010}{2014}\)

\(=\frac{2010\cdot2011\cdot2012\cdot2013\cdot2014}{2010\cdot2011\cdot2012\cdot2013\cdot2014}\)

= 1

ra 1 bạn nhé

1 1/9 x 1 1/10 x 1 1/11 x ... x 1 1/2011

=10/9 x 11/10 x 12/11 x ... x 2012/2011

khử

còn 2012/9

=\(\frac{10}{9}\)x\(\frac{11}{10}\)x\(\frac{12}{11}\)x.........x\(\frac{2012}{2011}\)

=\(\frac{2012}{9}\)

2(x-1)=6(10-x)

<=>2x-2=60-6x

<=>2x+6x=60+2

<=>8x=62

<=>x=62:8

<=>x=7,75

=> 2x - 2 = 60 - 6x

=> 2x + 6x = 2 + 60

=> 8x = 62

=> x = 7,75

(x + 1) + (2.x + 2) + (3.x + 3) + ... + (100.x + 100) = 45450

(x + 2.x + 3.x + ... + 100.x) + (1 + 2 + 3 + ... + 100) = 45450

x.(1 + 2 + 3 + ... + 100) + (1 + 2 + 3 + ... + 100) = 45450

(1 + 2 + 3 + ... + 100).(x + 1) = 45450

(1 + 100).100:2.(x + 1) = 45450

101.50.(x + 1) = 45450

5050.(x + 1) = 45450

x + 1 = 45450 : 5050

x + 1 = 9

x = 9 - 1

x = 8

Vậy x = 8

Ủng hộ mk nha ☆_☆^_-

(33066+98)/(33264-100)=33164/33164=1

Giải

167.198+98/198.168-100

=167.198+98/198.167+198-100

=167.198+98/198.167+98

=1