(3.x)^2 : 3^3=243
9.x^2 : 27=243
9.x^2=243.27
9.x^2=6561
x^2=6561:9
x^2=729
X=27
(3.x)^2 : 3^3=243
9.x^2 : 27=243
9.x^2=243.27
9.x^2=6561
x^2=6561:9
x^2=729
X=27
Tìm x: a) 8< 2^x < 2^9 * 2^-5
b) 27 < 81^3 / 3^x < 243
c) (2/5)^x > (5\2)^-3*(-2\5)^2
d) (-3/4)^3x-1 = 256/81Tìm x: a) 8< 2^x < 2^9 * 2^-5
b) 27 < 81^3 / 3^x < 243
c) (2/5)^x > (5\2)^-3*(-2\5)^2
d) (-3/4)^3x-1 = 256/81(-3/4)^3x-1=256/81. Tìm x ?
Có cách giải thì mới tick !!!!!!
1, Tìm x biết
a, ( 4/5 )^2x+5 = 625/256
b, ( 3x - 4 )^4 = ( 3x - 4 )^2
c, 3^x+1 = 9^x
d, 2^2x+3 = 4^x-5
Tìm x , biết :
a.\((\dfrac{-3}{4})^{3x-1}=\dfrac{256}{81}\)
tìm x, biết
a) (\(\frac{3}{4}\)) 3x-1= \(\frac{256}{81}\)
Tìm x: \(\frac{\left(x-2\right)^2}{2}-4\frac{1}{3}\left(x+3\right)^2=\frac{1}{4}\left(x-1\right)\left(x-2\right)-2\left(3x-1\right)\left(2+3x\right)\)
Tìm x: 1 + 2 ( x - 1 )( x + 2 ) - 2 ( 2x - 1 )^2 = 3 - 4 ( 2 + 3x ) - 3 (x + 1)
tìm x
a/ (x-1/4)4=1/256
b/ (3x-2)5 = -234
c/ x13= 27 X x10
d/ (4x-1)2= (1-4x)4