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If combined equation of two sides AB and...

If combined equation of two sides AB and AC of a triangle is `x^(2)-xy-2y^(2)+x+y=0` and `(1 ,1)` is orthocenter then circum - radius of `Delta ABC` is` (1) (5sqrt(2))/(3) (2) (10sqrt(2))/(2) (3) (3sqrt(2))/(5) (4) (3)/(10sqrt(7))`

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