Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
269 < 469 = (22)69 = 2138
531 > 431 = (22)31 = 262
Vì 2138 > 262 \(\Rightarrow\)269 > 531
Ta có : 354 = (32)27 = 927
531 > 527
Vì 927 > 527\(\Rightarrow\)354 > 531
B = ( 45 . 10 . 56 + 255 . 28 ) : ( 28 . 54 + 57 . 25 )
=> B = [ ( 22 )5 . 2 . 5 . 56 + ( 52 )5 . 28 ] : [ 25 . 54 . ( 23 + 53 )]
=> B = ( 210 . 2 . 57 + 510 . 28 ) : [ 25 . 54 . ( 8 + 125 )]
=> B = [ 28 . 57 . ( 23 + 53 )] : ( 25 . 54 . 133 )
=> B = 28 . 57 . 133 : 25 . 54 . 133
=> B = 23 . 53 = ( 2 . 5 )3 = 103 = 1000
= \(\frac{4^5.10.5^6+25^5.2^8}{2^8.5^4+5^7.2^5}\)
= \(\frac{\left(2^2\right)^5.2.5.5^6+\left(5^2\right)^5.2^8}{2^5.5^4\left(2^3+5^3\right)}\)
= \(\frac{2^{11}.5^7+5^{10}.2^8}{2^55^4\left(2^3+5^3\right)}\)
= \(\frac{2^8.5^7\left(2^3+5^3\right)}{2^55^4\left(2^3+5^3\right)}\)
= 23.53
= 103
Bài này mk vừa học xong nè :
a) 23.46.162 = 23.(22)6.(24)2 = 23.212.28 = 223.
b) 86 : 23 = (23)6 : 23 = 218 : 23 = 215.
c) 273 : 33 = (33)3 : 33 = 39 : 33 = 36.
d) 153 : 53 = (3.5)3 : 53 = 33.
e) 510.1254 = 510.(53)4 = 510.512 = 510+12 = 522.
g) 75.492 = 75.(72)2 = 75.74 = 78.
Nếu thấy đúng thì k mk nha.
a) \(2^3.4^6.16^2=2^3.\left(2^2\right)^6.\left(2^4\right)^2=2^3.2^{12}.2^8=2^{23}\)
b)\(8^6:2^3=\left(2^3\right)^6:2^3=2^{18}:2^3=2^{15}\)
c)\(27^3:3^3=\left(27:3\right)^3=9^3=729\)
d)\(15^3:5^3=\left(15:5\right)^3=3^3=27\)
e)\(5^{10}:125^4=5^{10}:\left(5^3\right)^4=5^{10}:5^{12}=5^{-2}=\frac{1}{5^2}=\frac{1}{25}\)
g)\(7^5.49^2=7^5.\left(7^2\right)^2=7^5.7^4=7^9\)
Bài 1:
a,(2x-15):13+51=64
=> (2x-15):13=64-51
=> (2x-15):13=13
=>(2x-15)=1
=> 2x =16
=> x = 8
Vậy: x= 8
\(=\left(2^{^{2^5}}.2.5.5^6+2^8.5^{2^5}\right):\left(2^8.5^4+5^7.2^5\right)\)
=\(=\left(2^{11}.5^7+2^85^{10}\right):2^5.5^4\left(2^3+5^3\right)\)
\(=2^8.5^7\left(2^3+5^3\right):2^5.5^4\left(2^3+5^3\right)=2^8.5^7:2^5.5^4=2^3.5^3=10^3=1000\)
b) 3^2 . [(5^2 - 3 ) : 11 ] - 2^4 + 2.10^3
= 9 . [(25 - 3 ) : 11 ] - 16 + 2.1000
= 9 . [22 : 11 ] - 16 + 2000
= 9 . 2 - 16 + 2000
= 18 - 16 + 2000
= 2 + 2000
= 2002
(72005 + 72004) : 72004
= 72005 : 72004 + 72004 : 72004
= 72005 - 2004 + 1
= 71 + 1
= 7 + 1
= 8
a) ( 3^5 . 3^7 ) : 3^10 + 5.2^4 - 7^3 : 7
= 3^10 : 3^10 + 80 - 7^2
= 1 + 80 - 49
= 32
( 45.10.56 + 26.255 ) : ( 28.54 + 57.25 )\(=\frac{4^5.10.5^6+2^6.25^5}{2^8.5^4+5^7.2^5}\)
\(=\frac{\left(2^2\right)^5.2.5.5^6+2^6.\left(5^2\right)^5}{2^5.5^4\left(2^3+5^3\right)}\)
\(=\frac{2^{10}.2.5^7+2^6.5^{10}}{2^5.5^4\left(8+125\right)}\)
=\(\frac{2^6.5^7\left(2^4.2+5^3\right)}{2^5.5^4.133}=\frac{2.5^3\left(16.2+125\right)}{133}=\frac{2.125.157}{133}\)
\(=\frac{39250}{133}\)
Tl
= 1000 nha bn
Hok tốt
Ông Kirito vui lòng viết rõ ràng ra đc ko?