=>3x-1=-1/3
=>3x=2/3
=>x=2/9
`(3x-1)^3=-1/27`
`=> (3x-1)^3=(-1/3)^3`
`=> 3x-1=-1/3`
`=> 3x=-1/3 +1`
`=> 3x=2/3`
`=>x= 2/3 : 3`
`=>x= 2/3 xx 1/3`
`=>x=2/9`
x-1/13-x-13/15=3x-15/27-4x-27/29
a) \(\left(\dfrac{1}{5}-\dfrac{3}{2}x\right)^2=\dfrac{9}{4}\)
b) \(\left(3x+1\right)^3=-27\)
c)\(7.3^{x-1}-3^{x+2}=-540\)
Vẽ đồ thị hàm số y=1/3x
Tính f(-2); f(5);f(-27)
Tìm x biết f(x)=-20
Điểm nào sau đây thuộc đồ thị hàm số y=1/3x
A(-2;5/3)
Tìm giá trị biết
a) (2x+3) ²=9/121
b) (3x-1) ³=-8/27
Giúp mìk vs
1. tìm x
a. x- \(\left(\dfrac{1}{3}\right)^3\)= \(\dfrac{-1}{3}\)
b. \(\left(\dfrac{4}{5}\right)^5.x=\left(\dfrac{4}{5}\right)^7\)
c. \(x+\left(\dfrac{1}{2}\right)^2=\dfrac{1}{16}\)
d. \(\left(3x+1\right)^3=-27\)
Tìm n,biết:
a)16 : 2n = 2
b)3n/82 = 27
c)(1/2)n = 1/8
Tìm x,biết:
a) |3x-1|=7
b) |1-2x| = 8
c) |2x + 5| = x + 12
TÌM x∈Q BIẾT :
a,(x-\(\frac{1}{2}\))=0
b,(x-2)2=1
c,(x-2)3=-8
d,(x+\(\frac{1}{2}\))2=\(\frac{1}{16}\)
e,(3x+1)3=-27
cho (3x-4y)/3=(4z-3x)/2=(3y-2z)/4
Tìm x,y,z biết 2x-y+z=27
Tìm x biết
a) \(2.3^x-405=3^{x-1}\)
b) \(\dfrac{x+1}{65}+\dfrac{x+3}{63}=\dfrac{x+5}{61}+\dfrac{x+7}{59}\)
c) \(\left|3x-5\right|=\left|\dfrac{1}{2}x+3\right|\)
d) \(\left(\dfrac{1}{81}\right)^x.27^{2x}=\left(-9\right)^4\)
