设xy≠0,x^2+y^2=1,如果I1=(x^4+y^4)/(x^6+y^6),I2=(x^4+y^4)/√(x^6+y^6),I3=√(x^4+y^4)/(x^6+y^6),则

问题描述:

设xy≠0,x^2+y^2=1,如果I1=(x^4+y^4)/(x^6+y^6),I2=(x^4+y^4)/√(x^6+y^6),I3=√(x^4+y^4)/(x^6+y^6),则
I1,I2,I3的大小关系是

∵x²+y²=1
且xy≠0
∴0