Question 1111454
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ln(x^4) = 5  <==== is equivalent to ====>


x^4 = {{{e^5}}}       (1)


The only real solution to the original equation  is  x = {{{root(4,e^5)}}}.


The other three roots of the equation (1),


    x = {{{-root(4,e^5)}}},  x = {{{i*root(4,e^5)}}},  x = {{{-i*root(4,e^5)}}}


are extraneous for the original equation.
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