1.

If the pair of lines ax^2 + 2hxy + by^2 + 2gx + 2fy +c=0 intersects on y axis then:- (a) 2fgh= bg^2 + ch^2 (b) bg^2 not equal to ch^2 (c) abc= 2fgh (d) none of these

Answer» If the pair of lines ax^2 + 2hxy + by^2 + 2gx + 2fy +c=0 intersects on y axis then:-
(a) 2fgh= bg^2 + ch^2
(b) bg^2 not equal to ch^2
(c) abc= 2fgh
(d) none of these


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