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[" 1.If "f:R rarr R" be defined as "f(x)...

[" 1.If "f:R rarr R" be defined as "f(x)=x+sin x+7" ,then "],[" 2.If "f(x)=(x^(2)-x)/(x^(2)+2x)" ,show that "f" is one-one function."]

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