2
4^x*(64+1)=260
4^x=260:65
4^x=4
x=1
3
{3x+2>0⇒x>-2/3
{1-2x>0⇒x<1/2<br>log(2)[(3x+2)/1-2x)]≥log(2)4
(3x+2)/(1-2x)≥4
(3x+2)/(1-2x)-4≥0
(3x+2-4+8x)/(1-2x)≥0
(11x-2)/(1-2x)≥0
x=2/11 x=1/2
_ + _
------------------[2/11]-----------(1/2)----------
x∈[2/11;1/2)