Ta có: \(4.3^{x+2}-2.3^{x+1}=810\)
\(4.3^{x+1}.3-2.3^{x+1}=810\)
\(2.3^{x+1}\left(2.3-1\right)=810\)
\(2.3^{x+1}.5=810\)
\(3^{x+1}=81=3^4\)
x+1=4
x=3
3x+2+4.3x+1=7.36
c) 4.3x+2-3x-1= 963 tìm x
(4.3x-4)-2=18
3^x -1 + 2.3x = 189
(2^11) + (2^10) + (2^9) + (2^3) + (2^2) + 2 + 1) + ((2^8) + (2^4) + 1) =
2.3x + 5.3x + 1 = 153
1/2.3x+1/3.4x+....+1/49.50x=1
Tìm x thuộc N, biết: A) 3.[(2.x-1)2-4] - 142= 72.53: 175.
B) 2.3x+1 -410: 47=(75:73).(33-52)
Tìm x thuộc N, biết: A) 3.[(2.x-1)2-4] - 142= 72.53: 175.
B) 2.3x+1 -410: 47=(75:73).(33-52)
2.3x+1 = 10. 312 + 8. 312
