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[" 7.If "alpha" and "beta" be the roots of the equation "x^(2)+3x+1=0" ,"],[" then the value of "((alpha)/(1+beta))^(2)+((beta)/(alpha+1))^(2)" is equal to "],[[" (a) "18," (b) "19],[" (c) "20," (d) "21]]

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