ơ kìa số to thé

\(10\cdot10=100\)

\(100\cdot100=10000\)

Tính:

10*10=100

100*100=10000

1000*1000=1000000

10000*10000=100000000

100000*100000=10000000000

1000000*1000000=1000000000000

10000000000*10000000000=100000000000000000000

B = \(-\frac{1}{10}-\frac{1}{100}-\frac{1}{1000}-...-\frac{1}{1000000}\)

B = \(-\left(\frac{1}{10}+\frac{1}{10^2}+\frac{1}{10^3}+...+\frac{1}{10^6}\right)\)

Đặt A = \(\frac{1}{10}+\frac{1}{10^2}+\frac{1}{10^3}+...+\frac{1}{10^6}\)

10A = \(1+\frac{1}{10}+\frac{1}{10^2}+...+\frac{1}{10^5}\)

9A = 10A - A = \(1-\frac{1}{10^6}\)

=> A = \(\frac{1-\frac{1}{10^6}}{9}\)

=> B = \(-\left(\frac{1-\frac{1}{10^6}}{9}\right)\)

C=(0,1+0,01+0,001+...+0,000001)=-0,111111

mình ko chép đề bài

tao không biết

1111111

tik mk nha bạn!

111111

11111**** 100% luôn cậu tích cho tớ nhé

10C=1-1/10-1/100-1/1000-1/10000-1/100000

10C-C=(1-1/10-1/100-1/1000-1/10000-1/100000)-(1/10-1/100-1/1000-1/10000-1/100000-1/000000)

9C=1-1/10-1/10+1/1000000=800001/1000000

C=800001/1000000:9=88889/1000000

rtrrgryhyghry5yhyryry4

=-9100997909

= -9100997909 

k mình nha

1 + 10 + 100 + 1000 + 10000 + 100000 + 10000000 + 1000000000 + 1000000000 - 11111111  x 1000 + 2000 - 20 = ??

Đáp án:

1 + 10 + 100 + 1000 + 10000 + 100000 + 10000000 + 1000000000 + 1000000000 - 11111111  x 1000 + 2000 - 20 

=9100997909

chúc bạn học tốt

ai nhanh mik k

-0,211111

88889/1000000=0.088889

= 1111100 nha bạn

1111100 thank you ban nhe????

1111100