Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
ta có :18=2.32; 135=32 .5.7
UCLN(18,315)=32=9
B(9)={0;9;18;27;....}
mà 5 < x ≤11
⇒x= 9 (tm)
a, [ 545 - ( 45 + 4 x 25 ) ] : 50 - 2000 : 250
[545 -( 45 + 100) ] : 50 - 2000 : 250
[ 545 - 145 ] : 50 - 2000 : 250
400 : 50 - 2000 : 250
8 - 8 = 0
b, [ 504 - ( 25 x 8 + 70 ) ] : 9 - 15 + 19
[ 504 - ( 200 + 70 ) ] : 9 - 15 + 19
[ 504 - 270 ] : 9 - 15 + 19
234 : 9 - 15 + 19
26 - 15 + 19 = 30
c, 5 x { 26 - [ 3 x ( 5 + 2 x 5 ) + 15 ] : 15 }
5 x { 26 -[ 3 x ( 5 + 10 ) + 15 ] : 15 }
5 x { 26 - [ 3 x 15 + 15 ] : 15 }
5 x { 26 - [ 45 + 15 ] : 15 }
5 x { 26 - 60 : 15 }
5 x { 26 - 4 }
5 x 22 = 110
\(E=\frac{3^6.45^4-15^{13}.5^{-9}}{27^4.25^3+45^6}\)
\(E=\frac{3^6.3^8.5^4-3^{13}.5^{13}.5^{-9}}{3^{12}.5^6+3^{12}.5^6}\)
\(E=\frac{3^{14}.5^4-3^{13}.5^4}{3^{12}.5^6\left(1+1\right)}\)
\(E=\frac{3^{13}.5^4\left(3-1\right)}{3^{12}.5^6.2}\)
\(E=\frac{3}{25}\)
\(\frac{3^6.\left(3^2.5\right)^4-\left(3.5\right)^3:5^9}{\left(3^3\right)^4.\left(5^2\right)^3+\left(5.3^2\right)^6}\) = \(\frac{3^{14}.5^4-3^3:5^6}{3^{12}.5^6+5^6.3^{12}}\) = \(\frac{3^{14}.5^{10}-3^3}{3^{12}.5^{12}+5^{12}.3^{ }^{12}^{ }}=\frac{3^{11}.5^{10}-1}{2.3^9.5^{12}}\)
a)[545-(45+4.25:50-2000:250+215:213
Đề bài sai
c) 5.{26-[3.(5+2.5)+15]:15}>
= 5.(26-(3.( 3.5 )+15):15)
= 5.(26-(3. 15 +15): 15)
= 5.(26-(3. 2. (15: 15)))
= 5.(26-(3. 2. 1 ))
= 5.(26- 6 )
= 5. 20
= 100 (máy tính của mik nó bị lỗi dấu ngoăc nhọn và ngoac vuông,mong bạn thông cảm)
a)[545-(45+4.25:50-2000:250+2\(^{15}\):2\(^{13}\) )
= [545- ( 45 + 100 : 50 - 2000 + \(2^2\))
= [545- ( 45 + 2 - 2000 + 4 )
= [ 545 - ( 47 - 2000 + 4 )
= [ 545 - ( -1935 + 4 )
= 545 - - 1949
= 2994
c) 5.{26-[3.(5+2.5)+15]:15}
5 . { 26 - [ 3 . ( 5 + 10 ) + 15 ] : 15 }
= 5 . { 26 - [ 3 . 15 + 15 ] : 15 }
= 5 . { 26 - [ 45 + 15 ] : 15 }
= 5 . { 26 - 60 : 15 }
= 5 . { -34 : 15 ]
= 5 . \(\frac{-34}{15}\)
= \(\frac{-34}{3}\)
Tính:
\(\dfrac{3^6.45^4-15^{13}.\dfrac{1}{5^9}}{27^4.25^3+45^6}\)
\(=\dfrac{3^6.\left(3^2.5\right)^4-\left(3.5\right)^{13}.5^{-9}}{\left(3^3\right)^4.\left(5^2\right)^3+\left(3^2.5\right)^6}\)
\(=\dfrac{3^6.3^8.5^4-3^{13}.5^{13}.5^{-9}}{3^{12}.5^6+3^{12}.5^6}\)
\(=\dfrac{3^{14}.5^4-3^{13}.5^4}{3^{12}.5^6+3^{12}.5^6}\)
\(=\dfrac{3^{13}.5^4.\left(3-1\right)}{2.3^{12}.5^6}\)
\(=\dfrac{3.2}{2.5^2}\)
\(=\dfrac{3}{25}.\)
Đoàn Đức Hiếu, Nguyễn Thanh Hằng, Nguyễn Huy Tú, Tuấn Anh Phan Nguyễn, Hoàng Ngọc Anh, ...
x+15+100=115
x+15=115-100
x+15=15
x=15-15
x=0
x+4.25=100
x+100=100
x=0