84. If f(x)= In then range of f(x) is

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( 84 cdot gamma ln left(frac{x^{3}+e}{x^{2}+1}right) ) ( frac{x^{2}+e}{x^{2}+1}>0 ) say den as denominatar and mumerator cannat be sero it is true for all ( x ) ( therefore x in B ) ( therefore ) Range is all real lo.

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