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     EduGorilla 
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    The condition that the line lx + my + n = 0 becomes a tangent to the ellipse , is

    Options :-

    1. a2l + b2m + n = 0
    2. al2 + bm2 = n2
    3. al + bm = n
    4. a2l2 + b2m2 = n2
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