1/ \(\left(6^{2007}-6^{2006}\right):6^{2006}\)

\(=\dfrac{6^{2007}-6^{2006}}{6^{2006}}\)

\(=\dfrac{6^{2007}}{6^{2006}}-\dfrac{6^{2006}}{6^{20006}}\)

\(=6^1-1\)

\(=6-1\)

\(=5\)

2/ \(\left(11^{1009}+11^{1008}\right):11^{1008}\)

\(=\dfrac{11^{1009}+11^{1008}}{11^{1008}}\)

\(=\dfrac{11^{1009}}{11^{1008}}+\dfrac{11^{1008}}{11^{1008}}\)

\(=11^1+1\)

\(=11+1\)

\(=12\)

a,\(\left(6^{2007}-6^{2006}\right):6^{2006}\)

\(=\left(6^{2007}:6^{2006}\right)-\left(6^{2006}:6^{2006}\right)\)

\(=6^1-1\)

\(=5\)

b,\(\left(11^{1009}+11^{1008}\right):11^{1008}\)

\(=\left(11^{1009}:11^{1008}\right)+\left(11^{1008}:11^{1008}\right)\)

\(=11^1+1\)

\(=12\)

(19-x)=-11-50

(19-x)=-61

x=19--61

x=80

-11-(19-x)=50

=> -11 -19+x=50

=> -30+x=50

x=-30-50

x=-80

k cho mh nha

mh trả lời đầu tiên

-11-(19-x)=50

          19-x=(-11)-50

          19-x=-61

                x=19-(-61)

                x=80

= 0,22 + 0,19 + 0,28 + 0,31

= 1

\(1111=1000+100+10+1=10^3+10^2+10^1+1\)

\(1247=1000+2\times100+4\times10+7=10^3+2\times10^2+4\times10^1+7\)

\(1543=1000+5\times100+4\times10+3=10^3+5\times10^2+4\times10^1+3\)

\(1794=1000+7\times100+9\times10+4=10^3+7\times10^2+9\times10^1+4\)

\(1876=1000+8\times100+7\times10+6=10^3+8\times10^2+7\times10^1+6\)

\(1008=1000+8=10^3+8\)

\(1080=1000+8\times10=10^3+8\times10^1\)

\(1709=1000+7\times100+9=10^3+7\times10^2+9\)

\(1500=1000+5\times100=10^3+5\times10^2\)

\(1097=1000+9\times10+7=10^3+9\times10^1+7\)

\(20000=2\times10000=2\times10^4\)

\(27000=2\times10000+7\times1000=2\times10^4+7\times10^3\)

\(28700=2\times10000+8\times1000+7\times100\)

\(24004=2\times10000+4\times1000+4=2\times10^4+4\times10^3+4\)

\(26013=2\times10000+6\times1000+1\times10+3=2\times10^4+6\times10^3+10^1+3\)

\(20508=2\times10000+5\times100+8=2\times10^4+5\times10^2+8\)

\(20358=2\times10000+3\times100+5\times10+8=2\times10^4+3\times10^2+5\times10^1+8\)

\(20009=2\times10000+9=2\times10^4+9\)

\(29830=2\times10000+9\times1000+8\times100+3\times10=2\times10^4+9\times10^3+8\times10^2+3\times10^1\)

\(25763=2\times10000+5\times1000+7\times100+6\times10+3=2\times10^4+5\times10^3+7\times10^2+6\times10^1+3\)

M = 8 -9 + 10 - 11 + 12 - 13 +.....+ 1006 - 1007 + 1008 - 2002

Đặt N = 8 - 9 + 10 - 11 + 12 - 13 +....+ 1006 - 1007 

Xét dãy số : 8; 9; 10; 11; 12; 13; .....;1006; 1007

Khoảng cách dãy số là 9-8=1

Số hạng dãy số là: (1007 -8):1 + 1 = 1000 (số)

Nhóm 2 số hạng liên tiếp thành một nhóm thì tổng N có số nhóm là:

1 000 : 2 = 500 (nhóm)

Mỗi nhóm có giá trị là: ( 8-9) = -1

N = -1.500 = -500

M = N + 1008 - 2022

M = -500 + 1008 - 2022

M = -1514