Ta có: (2x - 1)3 = -8
=> (2x - 1)3 = (-2)3
=> 2x - 1 = -2
=> 2x = -1
=> x = -1/2
Vậy x = -1/2
\(\left(2x-1\right)^3=-8\)
\(=>2x-1=-2\)
\(=>2x=-2+1\)
\(=>2x=-1\)
\(=>x=\frac{-1}{2}\)
ỦNg hộ nha
Thanks
Tìm x, biết
a)(2x-1)^5-(2x-1)^8=0
b)(2x+1). (2x-3)<0
c)(x-1). (2x+3)>0
TÌM X BIẾT:
a) 3 mũ -1 nhân 3 mũ x+5 nhân 3 mũ x-1 bằng 162
b) (2x-1)^6=(2x-1)^8
c) (2x-4)^8=512
tìm x:
a) |4 - x| + 2x = 3
b) |x - 7| + 2x + 5 = 6
c) 3x - |2x + 1| = 2
d) |x + 2| - x = 2
e) |x - 3| = 21
f) |2x + 3| - |x - 3| = 0
g) |x + 1/8| + |x + 2/8| + |x + 5/8| = 4x
h) |x - 2| - |2x + 3| - x = -2
i) |2x - 3| - x = |2 - x|
k) 2. |x - 3| - |4x -1 = 0
Tìm x biết : a) 2x+3/15 = 7/5. b) x-2/9 = 8/3. c) -8/x = -x/18 d) 2x+3/6 = x-2/5. e) x+1/22 = 6/x f) 2x-1/2 = 5/x g) 2x-1/21 = 3/2x+1 h) 10x+5/6 = 5/x+1
a) (2x-1)^4=8^1
b) (x-1)^5= -32
c) 2^x +2^x+3=144
d) (2x-1)^6=(2x-1)^8
e) (x-7)^x+3 -(x-7)^x+1=0
Tìm x,biết
a)|x-1|+|x-3|=2x-1
b)|x+1|+|x-1|=0
c)|x+5|-|1-2x|=x
d)|x|-|2x+3|=x-1
e)|x|-|1-x|=x+|x-3|
g)|x-3|+|3x+4|=|2x+1|
h)|x-2|+|x-3|+|2x-8|=9
k)|x-1|+|x-3|+|x-5|+|x-7|=8
Giúp mình nha mình đang cần gấp
A) (x+2/3)3=1/8
B) 52x-1-125=0
C) 81/32x+1=3
Em cần gấp chiều nộp rồi ạ
Tìm x biết
| 2x+3 | + | 2x-1 | = 8/[ 3× (x+1)^2 + 2 ]
Tìm x biết :
a) ( 2x - 3 ).( x +1 ) > 0
b) ( x + 5 ).(x-7) < 0
c) | 2x - 3 | + 8 = 10
d) ( 2x + 5 ) . | x -8 | . ( x2 + 1 ) = 0
,Tìm x, biết:
a, 3|x+4| - |2x+1| = 5
b, |x+5| - 3|2x+5| = 8
c,3|2x-3| - 6|x-1| = 3