\(D=4\times5^{100}\times\left[\left(\frac{1}{5}\right)\left(\frac{1}{5}\right)^2\left(\frac{1}{5}\right)^3...\left(\frac{1}{5}\right)^{100}\right]+1\)
\(=4\times5^{100}\times\frac{1}{5\times5^2\times...\times5^{100}}+1\)
\(=\frac{4}{5\times5^2\times...\times5^{99}}+1\)
\(=\frac{4}{5^{99\left(1+99\right):2}}+1=\frac{4}{5^{4950}}+1\)
cho Q = 1/5 - 2/5mu2 +3/5mu3- 4/5mu4+.... +2021/5mu2021 - 2022/5mu2022 . so sanh Q voi 5/36
A=1+5+5mu2+5mu3...+5mu10+5mu11chia het ch 6 va31
1/7x-x=(-3)/5mu2
3mu4 .5mu2 -128.2mu3 +1 mu 17
24-4mu2:4.2+ 3
thực hiện phép tính hợp lí nếu có thể
a 24.82+24.18-100
b(-26)+16+(-34)+26
c183+80 :[20-4(5mu2-24)]
d(-125)-[148+5.(-25)]
A=(5+5mu2)+(5mu3+5mu4)+(5mu5+5mu6)+(5mu7+5mu8)
A,160-[2mu3-6.25]
B,4.5mu-32chia2mu4
C,6mu2.4.3+5mu2
D,5.4mu2-18chia3mu2
bai 1;tim x biet ; a, 2 . (x-3)=5mu2-7 b, 23-2 mu 2 . ( x+4)=3 mu 3 -6 c, x . 2 mu 4 -3 mu 2 =7 mu 2 -(5 mu 2 -13)
bai 2 ; tinh hop li ;
a, 43.75 +43.25 b, 14.73+2.7 .37 -28.5 c, 34.56+44.17 .2+100.66
bai 5 ;tinh a,{92-[(4 mu 2 +71.2mu2);15]}-13
b, 360;{300;[150-5 mu 2 . (10 -2 mu3 )]}
a,12 1/3 - (3 3/4 + 4 3/4)
b,3 5/6 + 2 1/6 x 6
c,3 1/2 + 4 5/7 - 5 5/14
d,4 1/2 + 1/2 : 5 1/2