JEE MainMathematicsStraight Lines and Pair of Straight LinesMCQ+4 / −1
If the locus of the point, whose distances from the point and are in the ratio , is , then the value of is equal to :
- A37
- B
- C437
- D5
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Correct answer: A
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Let the moving point be .
Its distances from and are in the ratio . So,
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Squaring both sides:
Hence,
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Expand both sides.
Left side:
Right side:
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Bring all terms to one side:
Multiplying by :
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Compare with
So,
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Compute the required value:
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Therefore, the correct option is: i.e. Option A.
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