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If `e^x + e^(f(x)) = e` then domain of f(x) is |
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Answer» `e^x+e^y=e` `e^y=e-e^x` taking log both side `loge^y=ln(e-e^x)` `yloge=log(e-e^x)` `y=f(x)=log(e-e^x)` `e-e^x>0` `e>e^x` `lne>lne^x` `1>x` `x in (-oo,1)` |
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