sửa đề :
`2^x + 2^(x+1) + 2^(x+2) + 2^(x+3) =480`
`=> 2^x + 2^x . 2 + 2^x .2^2 + 2^x . 2^3 = 480`
`=> 2^x(1 + 2 + 2^2 + 2^3) = 480`
`=> 2^x.15 = 480`
`=> 2^x = 480 : 15 = 32`
`=> 2^x = 2^5`
`=> x = 5`
Vậy `x = 5`
Tìm x:
2x + 2x+1 + 2x+2 + 2x+3 = 480
Tìm x, biết:
4 * 2^x42 - 2x = 480
(2x^2 + 1)*(x-3)=0
48-(15-x)^5=48
1) (x + 1/2).(2/3 - 2x) = 0 2) 2/3x + 1/2x = 5/2 : 3 và 3/4 3) (2x - 3)(6 - 2x)= 0 4) -5(x + 1/5) - 1/2(x - 2/3) = 3/2x - 5/6
2x+2x+1+2x+2+2x+3+...+2x+2021=22025-8
giải các bất phương trình sau và biểu diễn nghiệm trên trục số:
a)2x+2>4
b)3x+2.-5
c)10-2x>2
d)1-2x<3
e)10x+3-5x<=14x+12
f)(3x-1)<2x+4
g)4x-8>=3(2x-1)-2x+1
h)x^2-x(x+2)>3x-1
i)x+8>3x-1
j)3x-(2x+5)<=(2x-3)
k)(x-3)(x+3)<x(x+2)+3
l)2(3x-1)-2x<2x+1
m)3-2x/5>2-x/3
n)x-2/6-x-1/3<=x/2
o)x+1/3>2x-1/6-2
p)1+2x+1/3>2x-1/6-2
q)x+5/6-2x+1/3<=x+3/2
r)5x+4/6-2x-1/12>=4
2x + 2x + 1 + 2x + 2=960 - 2x + 3
a/ 2.(1/2x -1/3)-3/2=1/4
b/ (1/2+2x)(2x-3)=0
c/ (4x-5)(5/4x-2)=0
d/ 1/4-(2x+1/2)mũ hai=0
B) 17X - ( -16X - 37 ) + 2x + 43
C) -2x -3.( x-17) = 34 -2 (-2x +25)
D) 17x+ 3. ( -16x -37) = 2x +43 -4x
E) {- 3x +2. [45 - x-3 (3x + 7) - 2x] + 4x} =55
F) -103 - 57 : [ -2 ( 2x -1 )2 - ( -9 )0 ] - 106
G) -2x + 3. { 12-2 [ 3x - ( 20 + 2x ) - 4x ] + 1} = 45
Tìm x : (2x + 1) + (2x + 2) + (2x + 3) + ... + (2x + 2015) = 0
Tìm số tự nhiên x, biết
a) ( 2 x - 1 ) 3 = 27
b) ( 2 x + 1 ) 3 = 125
c) ( x + 2 ) 3 = ( 2 x ) 3
d) ( 2 x - 1 ) 7 = x 7
