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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 circumradius of `Delta` ABC is 1) `(5sqrt(2))/(3)` 2) `(10sqrt(2))/(3)` 3) `(3sqrt(2))/(5)` 4) `(3)/(10sqrt(2))`

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