Prove that the line \( 4 x+y-5=0 \) is a tangent to the circle \( x^{2}+y^{2}+2 x-y-3=0 \). Also...

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Prove that the line \( 4 x+y-5=0 \) is a tangent to the circle \( x^{2}+y^{2}+2 x-y-3=0 \). Also...
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