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    				| 1. | 
                                    The set of all real values of x for which f(x)=log_(e)sqrt((1+x)/(1-x))+log_(e)((1+sqrt(1-x^(2)))/x)+coth^(-1)x+log_(e)((1+sqrt(1+x^(2)))/x)+sinh^(-1)x is defined is | 
                            
| Answer» ANSWER :B | |