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[" 25.In "Delta ABC" ,if "r(1)=2r(2)=3r(...

[" 25.In "Delta ABC" ,if "r_(1)=2r_(2)=3r_(3)" then "(a)/(b)+(b)/(c)+(c)/(a)],[[" A) "(75)/(60)," B) "(155)/(60)," C) "(176)/(60)," D) "(191)/(60)]]

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