Tính \(I=\int\limits_{0}^{1}{{{e}^{3x}}.dx}.\)

Câu hỏi: Tính \(I=\int\limits_{0}^{1}{{{e}^{3x}}.dx}.\)

A \(I={{e}^{3}}-1.\)                    

B \(I=e-1.\)                     

C \(\frac{{{e}^{3}}-1}{3}.\)                   

D \(I={{e}^{3}}+\frac{1}{2}.\)