\(\dfrac{1}{9}:x=\dfrac{1}{2}-\dfrac{3}{4}\)
\(\dfrac{1}{9}:x=\dfrac{-1}{4}\)
\(x=\dfrac{1}{9}:\dfrac{-1}{4}\)
\(x=-\dfrac{4}{9}\)
Bài 1. Tìm x, biết:
a/ 1/4.(x-3)+2=1/5
b/ 1/7-2.(x+1)=1/4+2/3
c/ 1/4.(2x+3)-1/9=2/5
d/ 3/2.(x+1)-4/9=2/3
e/ 4/5.(2-3x)+4/7=2và1/3
[Cần gấp ạ!]
a) 1/2 + 3/4 x = 1/4
b) 5/6 + 1/6 : x = -2
c) X x ( X - 2/3 ) = 0
d) ( -2/3 ) × 4/19+ 5/3 × 4/9
e) 5/9 : ( 1/11 - 5/22 ) + 5/9 : ( 1/15 × 2/3 )
Tính giá trị biểu thức :
A = ( 3 - 1 / 4 + 2 /3 ) - ( 5 1/3 - 6/5 ) - ( 6 - 7/4 + 3 /2 )
B = 1 / 3 - 3 / 4 - ( -3/ 5 ) + 1 /64 - 2 / 9 - 1 /36 + 1 / 15
C = 1 / 3 - 3 / 5 + 5/7 - 7/ 9 + 9 /11 - 11 / 13 + 13 / 15 + 11/ 13 - 9 /11 + 7 / 9
D = 1/99 - 1 /99 x 98 - 1 / 98 x 97 - 1 /97 x 96 - ........ - 1 / 3x 2 - 1/ 2 x 1
Tính giá trị biểu thức :
A = ( 3 - 1 / 4 + 2 /3 ) - ( 5 1/3 - 6/5 ) - ( 6 - 7/4 + 3 /2 )
B = 1 / 3 - 3 / 4 - ( -3/ 5 ) + 1 /64 - 2 / 9 - 1 /36 + 1 / 15
C = 1 / 3 - 3 / 5 + 5/7 - 7/ 9 + 9 /11 - 11 / 13 + 13 / 15 + 11/ 13 - 9 /11 + 7 / 9
D = 1/99 - 1 /99 x 98 - 1 / 98 x 97 - 1 /97 x 96 - ........ - 1 / 3x 2 - 1/ 2 x 1
Tìm x
1)1/9 nhân 3 mũ 4 nhân 3 mũ x = 3 mũ 7
2) 1/2 nhân 2 mũ x + 4 nhân 2 mũ x = 9 nhân 2 mũ 5
3)(3/4) mũ x = 2 mũ 8/ 3 mũ 4
4) 5 mũ (x - 1) nhân (x-2) = 1. Mình cần gấp
Tìm x
a) 3/5 - 2/7 < 2/3*x +3/4 < 1 / 2 + 7/9
b) 1/6 + 1/9 < 2/3 - 3/4*x < 2/3 + 1.25
c) 1+ 1/3 + 1 /6 + 1/10 +........+ 2/x.(x+1) = 3992/1997
Bài 1: Thực hiện phép tính.
A) 3: ( -1/2 )2 + 1/9 x Căn 36
B) 81 x ( 1/3)3 + 1/3
C) Căn 12 + Căn 27 - Căn 3
D) -32 - ( 1/2)-2 : 2 + (2/3)0 : (3/4)-1
E) 3/4 - ( -1/2 )2
F) 15/16 : (-2 2/3) + 15/16 : ( -1 3/5 )
G) 3/5 + -1/4 + 3/20
H) 3: ( -3/2)2 + 1/9 x căn 36
I) 272 x 85/ 66 x 323
J) (0.8)5/ (0.4)6
K) 272/ 242
L) (0.125)3 x 83
M) (-39)4 : 134
N) (0.6)5/ (0.2)6
O) ( 3/7 + 1/2 )2
P) 2:(1/2 - 2/3 )2
Q) 9x (-1/3)3 + 1/3
\(\left(3-x\right)^3=-\dfrac{27}{64};\left(x-5\right)^3=\dfrac{1}{-27};\left(x-\dfrac{1}{2}\right)^3=\dfrac{27}{8};\left(2x-1\right)^2=\dfrac{1}{4};\left(2-3x\right)^2=\dfrac{9}{4};\left(1-\dfrac{2}{3}\right)^2=\dfrac{4}{9}\)
Tìm x biết: a)3/5-2/7<2/3.x+3/4<1/2+7/9
b)1/6+1/9<2/3-3/4.x<2/3+1.25
Tính
(2/5)^6 : (2/5)^4
(3/16)^2 : (9/8)^2
(2/7 - 1/2)^2
Tìm x , biết
x/1,5 = 4/3
2/9 = x/-72
x: -3/8 = 1/3
|x| = 3,5
|x - 1| = 3,5
Tính
(3/7 + 1/2)^2
(1+2/3 - 1/4)x(4/5 - 3/4)^2
