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If a circle having centre at (alpha, bet...

If a circle having centre at `(alpha, beta)` cut the circles `x^2 + y^2 - 2x - 2y - 7 = 0 and x^2 + y^2+ 4x - 6y - 3=0` orthogonally, then `|3/4 alpha - beta/2|` is equal to

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The correct Answer is:
`0.5`
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