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[" 10.Let "f:R rarr R" ,then "f(x)=2x+|c...

[" 10.Let "f:R rarr R" ,then "f(x)=2x+|cos x|" is "],[[" (A) on: "," (B) one-one and onto "],[" (C) many-one and into "," (D) many one and onto "]]

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