1. 设2^x=a则a^2+a-2=0,解得a=1或-2(舍去)即2^x=1,所以x=02. 两边取4的乘方,得3x-1=(x-1)(3+x)即x^2-x-2=0,解得x=-1或2,又3x-1>0, x-1>0, 3+x>0所以x=23. 实根成对围绕3出现,则和为6*6=364. x^2-1>0, log(1/2)(x^2-1)>=0,即x^2-1<=1/2所以x>1或x<-1且-6^0.5/2<=x<=6^0.5/2,综合可知,定义域为-6^0.5/2<=x<-1或1增区间为-6^0.5/2<=x<-1