1.

\(\smallint \frac{{{\rm{dx}}}}{{1 + {{\rm{e}}^{ - {\rm{x}}}}}}\) is equal toWhere c is the constant of integration

A. 1 + ex + c
B. In (1 + e-x) + c
C. In (1 + ex) + c
D. 2 In (1 + e-x) + c
Answer» D. 2 In (1 + e-x) + c


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