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P△一 3PY PY 一 3P△ PY－P△ PY2P△
prohibit postpone predict preserve
prohibit postpone predict preserve
IΔ /IY=1/3 ，PΔ /PY=1/3 IΔ /IY=3，PΔ / PY = IΔ /IY=3，PΔ / PY =1/3 IΔ =IY，PΔ = PY
MUx/MU=TUx/TUy MUx/MUy=Px/Py MUx/Px=MUy/Py MUx/Py=MUy/Px
P△＝PY P△＝3PY PY＝3P△ P△＝√3PY
PY-100和DX-300 SWEP-06和DX-300 PC和PY-100 SWEP-06和PY-100
P ∆ =3PY P y =3P△ PY =P△ PY =2P△
无差异曲线与预算线相切 MRSxy=Px/Py MUx/Px=MUy/Py MUx/MUy=Px/Py
PY1运输需求价格弹性较大 PY2运输需求价格弹性较大 PY1和PY2运输需求价格弹性一样 不能确定
GB23441-2009中PY类卷材 GB18242-2008中ⅠG型 GB18243-2008中ⅠPY型 GB/T23457-2009中PY类卷材
GB23441-2009中N类卷材 GB18242-2008中ⅠPY类 GB/T23457-2009中PY类 GB18243-2008中ⅡPY类
GB/T23457-2009中PY类 GB18243-2008中ⅡPY类 GB18242-2008中ⅠPY类 GB23441-2009中PY类卷材
P△=3PY PY =3P△ PY =P△ PY =2P△
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