Xét \(\int\limits_{\frac{1}{e}}^e {\dfrac{1}{{x\ln x}}dx,} \) nếu đặt \(t = \ln x\) thì \(\int\limits_{\frac{1}{e}}^e {\dfrac{1}{{x\ln x}}dx} \) bằng
A.\(\int\limits_{ - 1}^1 {dt.} \)
B.\(\int\limits_{ - 1}^1 {\dfrac{1}{{{t^2}}}dt.} \)
C.\(\int\limits_{ - 1}^1 {\dfrac{1}{t}dt.} \)
D.\(\int\limits_{ - 1}^1 {tdt.} \)
A.\(\int\limits_{ - 1}^1 {dt.} \)
B.\(\int\limits_{ - 1}^1 {\dfrac{1}{{{t^2}}}dt.} \)
C.\(\int\limits_{ - 1}^1 {\dfrac{1}{t}dt.} \)
D.\(\int\limits_{ - 1}^1 {tdt.} \)
Loga
Hóa Học lớp 12
