x+1>2/x <=> [x(x+1)-2]/x>0 <=> (x+2)(x-1)x>0 <=> -21 => 不等式x+1>2/x的解集:(-2,0)∪(1,+∞)
x+1>2/xx+1-2/x>0(x²+x-2)/x>0(x+2)(x-1)/x>0即(x+2)x(x-1)>0x>1或-2<x<0
x+1-2/x>0(x²+x-2)/x>0即x(x+2)(x-1)>0零点-2,0,1所以-21