Помогите решить показательные уравнения Помогите решить :З

Question

Наталья · Accepted Answer

Так: 
 
4^(x + x) = 1 --> x + x = 0 --> x = -1; x = 0. 
 
3^(x + 2) + 3^(x) = 90 --> 10*3^(x) = 90 --> x = 2. 
 
2^(3 + 5x) = 8^(x - 3) --> 3 + 5x = 3x - 9 --> x = -6. 
 
128*16^(2x + 1) = 8^(3 - 2x) --> 128*2^(8x + 4) = 2^(9 - 6x) --> 2^(8x + 11) = 2^(9 - 6x) --> 8x + 11 = 9 - 6x --> 14x = -2 --> x = -1/7.