=>2x-3=6 hoặc 2x-3=-6
=>2x=9 hoặc 2x=-3
=>x=9/2 hoặc x=-3/2
(x-1)^3=27
<=>(x-1)^3=3^3
<=>x-1=3
<=>x=4
`(x-1)^3 = 27`
`=> (x-1)^3 = 3^3`
`=> x-1 = 3`
`=> x = 3 + 1`
`=> x = 4`
=>2x-3=6 hoặc 2x-3=-6
=>2x=9 hoặc 2x=-3
=>x=9/2 hoặc x=-3/2
(x-1)^3=27
<=>(x-1)^3=3^3
<=>x-1=3
<=>x=4
`(x-1)^3 = 27`
`=> (x-1)^3 = 3^3`
`=> x-1 = 3`
`=> x = 3 + 1`
`=> x = 4`
\(\left(3-x\right)^3=-\dfrac{27}{64};\left(x-5\right)^3=\dfrac{1}{-27};\left(x-\dfrac{1}{2}\right)^3=\dfrac{27}{8};\left(2x-1\right)^2=\dfrac{1}{4};\left(2-3x\right)^2=\dfrac{9}{4};\left(1-\dfrac{2}{3}\right)^2=\dfrac{4}{9}\)
tìm x
a) x: 27=3,6
b)\(\dfrac{2x+1}{-27}\) =\(\dfrac{-3}{2x+1}\)
viết các biểu thức sau dưới dạng lũy thừa
a) 9 x 3 mũ 2 x 1/81 x 27
b) 4x32 :(2 mũ 3 x 1/16)
c)3 mũ 4 x 3 mũ 5 : 1/27
d) 81 mũ 11 x 3 mũ 17 / 27 mũ 10 x 9 mũ 15
Tìm x:
a)(1/3)^x=1/729
b)(1/3-1/2)^x-1 =1/36
c)81^2x . 27^x = -27
d)(x-2)^2 =1
tìm x
3x /27=27
9x-1 =1/9
32/2x=4
27/3x=3
9x:3x=32015
2 x 3x + 3x-1=7-(32+ 2 x 62)
7x+2 + 2 x 7x-1=345
(3/5)mũ 5 . x = (3/7)mũ 7
(-1/3)mũ 3 . x = 1/81
(x - 1/2) mũ 3 = 1/27
(3x + 1)mũ 3 = -27
(x + 1/2) mũ 4 = 16/81
(4/5) mũ 5.x = (4/5) mũ 7
tìm x trong các tỉ lệ thức sau:
a,x:27=-2 : 3,6
b,2x+1/-27= -3/2x+1
Tìm x biết
\(|x+\frac{1}{3}|+\frac{4}{5}=|\left(-3,2\right)+\frac{2}{5}|+\left(27-\frac{3}{5}\right)\left(27-\frac{3^2}{6}\right)\left(27-\frac{3^3}{7}\right)...\left(27-\frac{3^{2010}}{2014}\right)\)
tìm x:
\(|x+\frac{1}{3}|+\frac{4}{5}=|\left(-3,2\right)+\frac{2}{5}|+\left(27-\frac{3}{5}\right)\left(27-\frac{3^2}{7}\right)\left(27-\frac{3^3}{7}\right)...\left(27-\frac{3^{2010}}{2014}\right)\)
Tìm x:
\(a\)) \(\dfrac{2}{3}+\left(x-\dfrac{1}{2}\right)^3=\dfrac{19}{27}\)
\(b\)) \(\left(\dfrac{3}{2}\right)^{2x-1}:\left(\dfrac{27}{8}\right)^3=\dfrac{81}{16}\)
\(c\)) \(\dfrac{1}{2}.2^x+4.2^x=9.2^5\)
\(d\)) \(\text{12 - (2x +1)}^2=-69\)