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For `x in R` and a continuous function `f,` let `I_1=int_(sin^2t)^(1+cos^2t)xf{x(2-x)}dx` and `I_2=int_(sin^2t)^(1+cos^2t)f{x(2-x)}dx`.Then `(I_1)/(I_2)` is (a) -1 (b) 1 (c) 2 (d) 3

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