D=4×5mu100×(1/5+1/5mu2+...+1/5mu100)+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
đề bài là vậy :\(\frac{1}{7}x-x=\frac{\left(-3\right)^2}{5}\)
3mu4 .5mu2 -128.2mu3 +1 mu 17
24-4mu2:4.2+ 3
`@` `\text {Ans}`
`\downarrow`
`3^4*5^2 - 128*2^3 + 1^17`
`= 9^2*5^2 - 2^7*2^3 + 1`
`= (9*5)^2 - 2^10+1`
`= 45^5-2^10 + 1`
`= 2025 - 1024 + 1`
`= 2025 - 1023`
`= 1002`
\(24-4^2\div4\cdot2+3\)
`= 24 - 4*2 + 3`
`= 24 - 8 + 3`
`= 24 - 5`
`= 19`
`@` `\text {Kaizuu lv u}.`
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)]
em học lớp mấy
a, 24.(82+18)-100
=(24.100).100
=2400-100
=2300
xl nha nik chỉ làm đc phần a thôi
Phương thảo , thank you
A=(5+5mu2)+(5mu3+5mu4)+(5mu5+5mu6)+(5mu7+5mu8)
Cho P= 5mũ 0+5mu1+5mu2+....+5mu 2016va Q= 5mu 2017:4
tinh Q-P
\(P=1+5+5^2+..........+5^{2016}\)
\(\Leftrightarrow5P=5+5^2+5^3+............+5^{2017}\)
\(\Leftrightarrow5P-P=\left(5+5^2+..........+5^{2017}\right)-\left(1+5+..........+5^{2016}\right)\)
\(\Leftrightarrow4P=5^{2017}-1\)
\(\Leftrightarrow P=\dfrac{5^{2017}-1}{4}\)
Mà \(Q=\dfrac{5^{2017}}{4}\)
\(\Leftrightarrow Q-P=\dfrac{5^{2017}}{4}-\dfrac{5^{2017}-1}{4}=\dfrac{5^{2017}-5^{2017}-1}{4}=-\dfrac{1}{4}\)
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 )]}