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[" If the pair of lines given by "],[ax^...

[" If the pair of lines given by "],[ax^(2)+2hxy+by^(2)+2gx+2fy+c=0" intersect on "],[" X-axis then: "],[[" (a) "b,f,c" are in A.P.(b) "a,,f,c" are in G.P."],[" (c) "a,g,c" are in G.P.(d) "a,g,c" are in A.P."]]

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