(1)方程有两个实根,∴2^2-4m≥0
解得m≤1
(2)x2/x1+x1/x2
=(x2²+x1²)/(x1x2)
=[(x1+x2)²-2x1x2]/(x1x2)
=[4-2m]/m
=1
解得m=4/3
∵4/3>1,∴不存在