A, [( 8.x-12) : 4 ] . 33 = 36
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tâm đối xứng là tâm mà khi ta quay nửa vòng tròn quanh tâm đó thì được vị trí mới trùng khí với vị trí ban đầu
\(\dfrac{2^3.9^4+9^3.45}{9^2.10-9^3.3}\)
\(=\dfrac{2^3.3^8+3^6.3^2.5}{3^4.2.5-3^7}\)
\(=\dfrac{2^3.3^8+3^8.5}{3^4.2.5-3^7}\)
\(=\dfrac{3^8\left(2^3+5\right)}{3^4\left(2.5-3^3\right)}\)
\(=\dfrac{3^4.13}{-17}\)
(23.94 +93.45): (92.10- 93.3)
= (23.94 + 94.5): {92.( 10 -27)}
= 94.(8+5):(92.(-17))
= -92.13: 17
=-1053/17
\(\left(100-30\right)^2=100^2+30^2-2.100.30< 100^2+30^2\)
\(\left(3x-6\right)3=34\\ \Leftrightarrow3x-6=\dfrac{34}{3}\\ \Leftrightarrow3x=\dfrac{34}{3}+6\\ \Leftrightarrow3x=\dfrac{52}{3}\\ \Rightarrow x=\dfrac{52}{3}:3=\dfrac{52}{9}\)
(3x-6).3=34
3x-6=34/3
3x=34/3+6
3x=52/3
x=52/3:3
x=52/3x1/3
x=52/9
vậy x =52/9
HT
\(P=1-2+2^2-2^3+...-2^{99}+2^{100}\)
\(2P=2-2^2+2^3-2^4+...-2^{100}+2^{101}\)
\(\Rightarrow2P+P=3P=1+2^{101}\)
\(\Rightarrow P=\dfrac{1+2^{101}}{3}\)
Tick cho chị nha❤
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[( 8.x - 12) : 4 ] . 33 = 36
[( 8.x - 12) : 4 ] = 36 : 33
[( 8.x - 12) : 4 ] = 33
( 8.x - 12) : 4 = 27
8.x - 12 = 27 x 4
8.x - 12 = 108
8.x = 108 + 12
8.x = 120
x = 120 : 8
x = 15