a) ( x - 2/9 )3 = ( 2/3 ) 6
=> ( x - 2/9 )3 = (4/9 )3
=> x - 2/9 = 4/9
=> x = 4/9 - 2/9
=> x = 2/9
Tìm x
a) ( x - 2/9 )3 = ( 2/3 ) 6
b) ( 8x - 1 ) 2n + 1 = 5 2n + 1
a) ( x - 2/9 )3 = ( 2/3 ) 6
=> ( x - 2/9 )3 = (4/9 )3
=> x - 2/9 = 4/9
=> x = 4/9 - 2/9
=> x = 2/9