(坐標(biāo)系與參數(shù)方程選做題)曲線與直線有兩個(gè)公共點(diǎn)，則實(shí)數(shù)的取值范圍是_________________.

 (坐標(biāo)系與參數(shù)方程選做題)

曲線與直線有兩個(gè)公共點(diǎn)，則實(shí)數(shù)的取值范圍是_________________.

_{(坐標(biāo)系與參數(shù)方程選做題)曲線與直線有}

_{兩個(gè)公共點(diǎn)，則實(shí)數(shù)的取值范圍是_________________.}

_{(坐標(biāo)系與參數(shù)方程選做題)曲線與直線有}

_{兩個(gè)公共點(diǎn)，則實(shí)數(shù)的取值范圍是_________________.}