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[" 13.The range of the function "y=sqrt(...

[" 13.The range of the function "y=sqrt(-2cos^(2)x+3cos x-1)" is "],[[" (A) "(0,2)," (B) "[(1)/(2sqrt(2)),1]],[" (C) "[0,(1)/(2sqrt(2))]," (D) none of these "]]

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