∫{(e^x-1)/(e^x+1)}Dx等于()
A: (e^x-1)/(e^x+1)+C
B: (e^x-x)ln(e^x+1)+C
C: x-2ln(e^x+1)+C
D: 2ln(e^x+1)-x+C
A: (e^x-1)/(e^x+1)+C
B: (e^x-x)ln(e^x+1)+C
C: x-2ln(e^x+1)+C
D: 2ln(e^x+1)-x+C
举一反三
- 1. $\int \frac{1}{x(1+x)} dx =$ A: \[\ln{(x)}-\ln{\left( x+1\right) }+C\] B: \[\ln{(x)}+\ln{\left( x+1\right) }+C\] C: \[x-\ln{\left( x+1\right) }+C\] D: \[-\ln{(x)}+\ln{\left( x+1\right) }+C\]
- 设函数f(x)=x+1/x,则f(x-1)=() A: x/x+1 B: x/x-1 C: 1/x+1 D: x/x-1
- lim(x→∞)(1-1/(x+1))^(-x-1)=lim(x→∞)(1/(x+1))^(-x-1)lim(x→∞)(1-1/(x+1))^(x+1)
- 【单选题】用if语句表示如下分段函数f(x),下面程序不正确的是()。 f(x)=2x+1 x>=1 f(x)=3x/(x-1) x<1 A. if(x>=1):f=2*x+1 f=3*x/(x-1) B. if(x>=1):f=2*x+1 if(x<1):f=3*x/(x-1) C. f=2*x+1 if(x<1):f=3*x/(x-1) D. if(x<1):f=3*x/(x-1) else:f=2*x+1
- ∫{(e^x-1)/(e^x+1)}Dx等于() A: (e^x-1)/(e^x+1)+C B: (e^x-x)ln(e^x+1)+C C: x-2ln(e^x+1)+C D: 2ln(e^x+1)-x+C