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     EduGorilla 
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    The length of the tangent from (x1, y1) to the circle x2 + y2 + 2gx + 2fy + c = 0, is

    Options :-

    1. (x12 + y12 + 2gx1 + 2fy1 + c)
    2. (x12 + y12)1/2
    3. [(x1 + g)2 + (y1 + f)2]1/2
    4. None of these
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