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Question

The locus of the point of intersection of the lines 3x-y-43k = 0 and 3kx+ky-43=0 for different values of k is the hyperbola__________________________.

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Solution

Since given lines are 3x-y-43k=0 i.e. k=3x-y43and 3kx+ky-43=0 i.e. k=433x+yequating, the value of k, we get, 3x-y43=433x+yi.e. 3x-y 3x+y=16×3i.e. 3x2-y2=48i.e. locus of point of intersection of the above line is the hyperbola given by,3x2-y2=48

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