\(\Leftrightarrow9^x-3^x=-1\\ \Leftrightarrow3^{2x}-3^x=-1\\ \Leftrightarrow3^x\left(3^2-1\right)=-1\\ \Leftrightarrow3^x=-\dfrac{1}{8}\Leftrightarrow x\in\varnothing\)
(x-1,2)^2=4
(x+1)^3=-125
(x+1,5)^8+(2,7-y)^10=0
3^-1.4^x+ 3.$^x+5/3. 27
9^-x. 27^x= 243
tìm x
a, x + 1/2x - 25%x = 10
b, x+x - 1+ x - 2 + x -3 + x - 4 + ... + x-50 = 255
c, 1 + 5 + 9 + 13 + 16 + ... + x =501501
a ) 4 . 3^x-1 + 2 . 3^x+2 = 4 . 3^6 + 2 . 3^9
b ) 5^x+4 - 3 . 5^x+3 = 2 . 5^11
c ) 11 . 6^x-1 = 11 . 6^11 + 2 . 6^13
a)(x+1/3)2=1/4
b)(2.x+3)2=9/121
c)(3.x-1)3= -8/27
d) 4x+4x+2= 112
Tìm x biết
a) (x-1/4)^2=4/9
b)( x+0,7)^3=-8
c) 2^x+2^x+3=144
d) 5-2:|x-2|=1
1. Tìm số nguyên x, y biết:
a) \(^{3^{4-x}}=27\)
b) \(^{3^{-1}}.^{4^x}+3.^{4^x}=\dfrac{5}{3}.^{2^7}\)
1. Tìm các số nguyên x,y biết :
a) \(^{3^{4-x}}\)-x = 2
b)3^-1.4^x + 3.4^x = \(\dfrac{5}{3}\).\(^{2^7}\)
Tìm x: a,(4/9)^x=(3/2)-5 b,(4/9)^2x+1=625/256
Tìm x biết:
1)25/12x+11/15=9/10
2)3/2x-2/5=1/3x-1/4
3)29/12[x]-5/6=3/8
4)[4x+3/4]-5/4=2
5)2x+2x+3=144
