若直线l1:x+(1+k)y=2-k与l2:kx+2y+8=0平行,则k的值是_____.
设函数= 2(x≤0)的反函数为y =,则函数y =的定义域为________
log(3+2) = ____________
已知a = log0.8,b = log0.9,c = 1.1,则a,b,c的大小关系是___________
若lg2 = a,lg3 = b,则lg=_____________
函数y=的单调递增区间是.