\(\frac{4}{3}B=-1+\frac{3}{4}-\left(\frac{3}{4}\right)^2+...+\left(\frac{3}{4}\right)^{99}\)

\(B=-\frac{3}{4}+\left(\frac{3}{4}\right)^2-\left(\frac{3}{4}\right)^3+...+\left(\frac{3}{4}\right)^{100}\)

\(\Rightarrow\)\(\frac{7}{3}B=-1+\left(\frac{3}{4}\right)^{100}\Rightarrow B=\frac{\left(\frac{3}{4}\right)^{100}-1}{\frac{7}{3}}=\frac{3\left[\left(\frac{3}{4}\right)^{100}-1\right]}{7}\)

Như vầy đủ gọn chưa bạn?

Ax1000 = 1830.11/5 - 672.22 -110.11/5 +1000

=(1830.11 -672.22.5-110.11+5000)/5

=(1830.11-6720.11-110.11+5000)/5=(1830.11-6830.11+5000)/5=(-5000.11+5000 )/5=-5000.10/5=-1000.10

vậy A = -10

= \(\frac{183}{100}\). \(\frac{11}{5}\)+ \(\frac{-168}{25}\). \(\frac{11}{5}\)- \(\frac{11}{100}\). \(\frac{11}{5}\)- ( - 1 )

=\(\frac{11}{5}\). ( \(\frac{183}{100}\)+ \(\frac{-168}{25}\)-\(\frac{11}{100}\)) + 1

=\(\frac{11}{5}\). ( - 5 ) +1

= - 11 + 1

= - 10

Ax1000=1830.11/5-672.22-110.11/5+1000

=(1830.11-672.22.5-110.11+5000)/5

=(1830.11-6720.11-110.11+5000)/5

=(1830.11-6830.11+5000)/5

=(-5000.11+5000)/5

=-5000.10/5

=1000.10

em ko giai duoc ,em lop 2

-3/2 - | 3x + 4 |.2/5= 2

<=> | 3x + 4 | = (2+3/2)/(2/5)

<=>  | 3x + 4 | = 35/4

<=>3x + 4 =35/4

Hoặc 3x + 4 = - 35/4

Tự giải nốt nha

\(|3x+4|.\frac{2}{5}=\frac{-3}{2}-2\)

\(|3x+4|.\frac{2}{5}=\frac{-7}{2}\)

\(|3x+4|=\frac{-7}{2}:\frac{2}{5}\)

\(|3x+4|=\frac{-35}{4}\)

\(\Leftrightarrow3x+4=\frac{-35}{4}\)        hoặc          \(3x+4=\frac{35}{4}\)

         x=\(\frac{-17}{4}\)                                                x=\(\frac{19}{12}\)

Vậy x=\(\frac{-17}{4}\) hoặc    x= \(\frac{19}{12}\)

\(=\left(-0,37+\frac{14}{8}\right).\left(-1.1\right)-\left(2,63-\frac{9}{24}\right).\left(-1,1\right)\)

\(=-1,1.\left(-0,37+\frac{14}{8}-2,63+\frac{9}{24}\right)\)

\(=-1,1.\left[\left(-0,37-2,63\right)+\left(\frac{14}{8}+\frac{9}{24}\right)\right]\)

\(=-1,1.\left[\left(-3\right)+\left(\frac{14}{8}+\frac{3}{8}\right)\right]\)

\(=-1,1.\left(-3+\frac{17}{8}\right)\)

\(=-1,1.\left(-\frac{7}{8}\right)\)

\(=\frac{77}{80}\)

=77\80

x + 100 = 500+ 400

x  +100 =900

x =900-100

x =800

x + 100 = 500+400

x + 100 =900

x = 900 -100

x = 800

x + 100 = 500 + 400

x + 100 = 900

x          = 900 - 100

x          = 800

vậy x = 800

(-0,37+14/8).-11/10-(2,63-9/24).(-1,1)=77/80

ok bạn ơi

\(\frac{7}{6}+\frac{5}{6}:5-\frac{3}{8}.\left(-3\right)^2\)

\(=\frac{7}{6}+\frac{5}{6}.\frac{1}{5}-\frac{3}{8}.9\)

\(=\frac{7}{6}+\frac{1}{6}-\frac{27}{8}\)

\(=\frac{8}{6}-\frac{27}{8}\)

\(=\frac{32}{24}-\frac{81}{24}\)

\(=\frac{-49}{24}\)

Chúc bạn học tốt !!!