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$The lengths of the perpendicular from the points (m^{2}, 2 m), (m m^{'}, m + m^{'}) and (m^{' 2}, 2 m^{'}) to the line x + y + 1 = 0 form$

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Correct option is B

p1=m2+2m+12=(m+1)22p2=mm′+m+m′+12=m′+1(m+1)2p3=m′2+2m′+12=m′+122

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The lengths of the perpendicular from the points m2,2m , mm′,m+m′ and m′2,2m′ to the line x+y+1=0 form

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$The lengths of the perpendicular from the points (m^{2}, 2 m), (m m^{'}, m + m^{'}) and (m^{' 2}, 2 m^{'}) to the line x + y + 1 = 0 form$