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Cosider `f(x)=1-e^((1)/(x)-1)` Q. If `D` is the set of all real `x` such that `f(x)ge0` then `D` is equal toA. `(-infty,infty)`B. `(2,infty)`C. `(-infty,0)cup(1,infty)`D. `(-1,infty)` |
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Answer» Correct Answer - B `1-e^((1)/(x)-1)gt0` i.e., `e^((1)/(x)-1)lt1` i.e., `(1)/(x)-1lt0` i.e., `(x-1)/(x)gt0` i.e., `x in (-infty,0)cup(1,infty)` |
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