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已知曲线\( C\)：\(\left( {\lambda + 1} \right){x^2} + \left( {\lambda + 1} \right){y^2} - 2x - \lambda - 3 = 0,\lambda \in R.\)则曲线\( C\)必过定点 ．
参考答案：\(\left( { - 1,0} \right)\)
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