A)
log[0,2] (3x-1) >= log [0,2] ( 3-x)
0< (3x-1) <= ( 3-x) <br>1/3 < x <= 1 - это ответ<br>
б)
log[3] (x^2-1) < log [3] ( x+1) +1
log[3] (x^2-1) < log [3] ( x+1) + log [3] (3)
0 < (x^2-1) < 3( x+1)
|x| > 1 и (x^2-1) < 3( x+1)
|x| > 1 и (x^2-3x-4) < 0
|x| > 1 и -1 < x < 4
1 < x < 4 - это ответ