B

9000066008

Level: 
B
Evaluate the following integral on \(\mathbb{R}\). \[ \int x\mathrm{e}^{x}\, \mathrm{d}x \]
\(x\mathrm{e}^{x} -\mathrm{e}^{x} + c,\ c\in \mathbb{R}\)
\(x^{2}\mathrm{e}^{x} - 2x\mathrm{e}^{x} + 2\mathrm{e}^{x} + c,\ c\in \mathbb{R}\)
\(2x^{3}\mathrm{e}^{x} - x\mathrm{e}^{x} + c,\ c\in \mathbb{R}\)
\(\frac{1} {2}x^{2}\mathrm{e}^{x} + c,\ c\in \mathbb{R}\)

9000070110

Level: 
B
Given \(z_{1} = 4\left (\cos \frac{5} {3}\pi + \mathrm{i}\sin \frac{5} {3}\pi \right )\) and \(z_{2} = 2\left (\cos \frac{1} {6}\pi + \mathrm{i}\sin \frac{1} {6}\pi \right )\), evaluate \(\frac{z_{1}} {z_{2}} \).
\(- 2\mathrm{i}\)
\(4\mathrm{i}\)
\(\mathrm{i}\)
\(-\frac{1} {2}\mathrm{i}\)

9000065907

Level: 
B
Evaluate the following integral on \(\mathbb{R}\). \[ \int \frac{x^{4} - 1} {x^{2} + 1}\, \text{d}x \]
\(\frac{1} {3}x^{3} - x + c,\ c\in \mathbb{R}\)
\(\frac{1} {3}x^{3} + x + c,\ c\in \mathbb{R}\)
\(\frac{1} {5}x^{5} - x +\ln |x^{2} - 1| + c,\ c\in \mathbb{R}\)
\(3x^{2} -\ln |x^{2} - 1| + c,\ c\in \mathbb{R}\)