1.
原式=-0.1;
2.
由x>y.
得x-y>0.
原式=|x-y|
=x-y;
(3)(m≠0时)
原式=[m^(1/2)*m^(1/3)*m^(1/4)]/[(m^(5/6)*m^(1/4)]
=m^(1/2+1/3+1/4-5/6-1/4)
=m^0
=1.
1.
原式=-0.1;
2.
由x>y.
得x-y>0.
原式=|x-y|
=x-y;
(3)(m≠0时)
原式=[m^(1/2)*m^(1/3)*m^(1/4)]/[(m^(5/6)*m^(1/4)]
=m^(1/2+1/3+1/4-5/6-1/4)
=m^0
=1.