[" 27."4sqrt(9)" fag "(a,0),(0,b)" 7eff ...

[" 27."4sqrt(9)" fag "(a,0),(0,b)" 7eff "(1,1)" # Prefta "(1)/(8)" it "(1)/(a)+(1)/(b)=],[[" (A) "0," (B) "2," (C) "1," (D) "(1)/(sin)vec " tg "]]

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