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Equation of the line joining the foci of the parabolas
$y^{2} = 4 x$ and $x^{2} = - 4 y$

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x+y−1=0

x−y−1=0

x−y+1=0

x+y+1=0

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detailed solution

Correct option is B

Foci of the parabolas are (1, 0) and (0, – 1) and the equation of the line joining them is y=x−1 or x−y−1=0

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Equation of the line joining the foci of the parabolas y2=4xand x2=−4y

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Equation of the line joining the foci of the parabolas
$y^{2} = 4 x$ and $x^{2} = - 4 y$