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若曲线\(C\):\(λx^{2}-x-λy+1=0(λ∈R)\)恒过定点\(P\),则点\(P\)的坐标是\((\) \()\)
\(m\in R\),动直线\({l}_{1}:x+my-1=0 \)过定点\(A\),动直线\({l}_{2}:mx-y-2m+3=0 \)过定点\(B\),若\({{l}_{1}}\)与\({{l}_{2}}\)交于点\(P\) \((\)异于点\(A,B)\),则\(\left| PA \right|+\left| PB \right|\)的最大值为
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