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[" If in a triangle "ABC,a^(2)+b^(2)+c^(...

[" If in a triangle "ABC,a^(2)+b^(2)+c^(2)=ca+ab sqrt(3)," then "],[[" (a) "A,B,C" are in A.P."," (b) "," triangle is isoceles "],[" (c) triangle is right angled "," (d) "a=2c]]

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