If the lines \( x+y+1=0 ; 4 x+3 y+4=0 \) and \( x+\alpha y \)
\( +\beta=0 \), where \( \alpha^{2....
If the lines \( x+y+1=0 ; 4 x+3 y+4=0 \) and \( x+\alpha y \)
\( \mathrm{P} \)
\( +\beta=0 \), where \( \alpha^{2}+\beta^{2}=2 \), are concurrent then:
(1) \( \alpha=1, \beta=-1 \)
(2) \( \alpha=1, \beta= \pm 1 \)
(3) \( \alpha=-1, \beta= \pm 1 \)
(4) \( \quad \alpha= \pm 1, \beta=1 \)
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