# How do you integrate the following questions?

1. Oct 22, 2006

### jkh4

How do you integrate the following questions?

1) x/((3-x^4)^(1/2))*dx

2) (1+e^x)/(1-e^x)*dx

3) (xlnx)/((x^2-1)^(1/2))*dx

thank you so much!!!

2. Oct 23, 2006

1. Set $$x^{2} = \sqrt{3}\sin \theta$$

2. Divide it and get $$\int 1 + \frac{2e^{x}}{1-e^{x}} dx$$

3. Use integration by parts.

Last edited: Oct 23, 2006