MathematicsEasy210×since 2002Q3281Limn→∞∑r=1n1nern\mathop {Lim}\limits_{n \to \infty } \sum\limits_{r = 1}^n {{1 \over n}{e^{{r \over n}}}}n→∞Limr=1∑nn1enr isAe+1e+1e+1Be−1e-1e−1C1−e1-e1−eDeeeCheck answerSkip