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    Question

    The third proportional to (x² – y²) and (x–y)

    is:
    A (x – y) Correct Answer Incorrect Answer
    B x – y/x + y Correct Answer Incorrect Answer
    C x + y/x – y Correct Answer Incorrect Answer
    D (x + y) Correct Answer Incorrect Answer

    Solution

    Let the third proportional z. ATQ- (x² – y²) :(x–y): (x–y): z z × (x² – y²) = (x–y) × (x–y) =(x–y) × (x–y) / (x² – y²) =(x-y)/(x+y).

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