B

9000070708

Level: 
B
Differentiate the following function. \[ f(x) =\ln \left (\frac{1 + x} {1 - x}\right ) \]
\(f^{\prime}(x) = \frac{2} {1-x^{2}} ,\ x\in \left (-1,1\right )\)
\(f^{\prime}(x) = \frac{2} {1-x^{2}} ,\ x\in \mathbb{R}\setminus \left \{-1,1\right \}\)
\(f^{\prime}(x) = \frac{1-x} {1+x},\ x\in \left (-1,1\right )\)
\(f^{\prime}(x) = \frac{1-x} {1+x},\ x\in \mathbb{R}\setminus \left \{-1,1\right \}\)

9000070807

Level: 
B
Differentiate the following function. \[ f(x) = \frac{x^{4} + 3} {x^{2}} + x^{3} \]
\(f'(x) = 3x^{2} + 2x - \frac{6} {x^{3}} ,\ x\in \mathbb{R}\setminus \{0\}\)
\(f'(x) = 6x^{2} - 2x - \frac{6} {x^{3}} ,\ x\in \mathbb{R}\setminus \{0\}\)
\(f'(x) = 3x^{2} + 2x + \frac{6} {x^{3}} ,\ x\in \mathbb{R}\setminus \{0\}\)
\(f'(x) = 6x^{2} - 2x + \frac{6} {x^{3}} ,\ x\in \mathbb{R}\setminus \{0\}\)

9000065904

Level: 
B
Evaluate the following integral on the interval \((0,+\infty)\). \[ \int \frac{x^{3} + 2x} {x^{2}} \, \text{d}x \]
\(\frac{1} {2}x^{2} + 2\ln |x| + c,\ c\in \mathbb{R}\)
\(x +\ln |x| + c,\ c\in \mathbb{R}\)
\(\frac{1} {4}x^{4} + 4x^{2} +\ln |x^{2}| + c,\ c\in \mathbb{R}\)
\(2x^{2} + 2 +\ln |x^{2}| + c,\ c\in \mathbb{R}\)

9000065905

Level: 
B
Evaluate the following integral on the interval \((0,+\infty)\). \[ \int \frac{\left (\sqrt{x} + 2\right )^{2}} {x} \, \text{d}x \]
\(x + 8\sqrt{x} + 4\ln |x| + c,\ c\in \mathbb{R}\)
\(\sqrt{x} + 8x + 4\ln |x| + c,\ c\in \mathbb{R}\)
\(\frac{1} {2}x^{-\frac{1} {2} } + 2x +\ln |x| + c,\ c\in \mathbb{R}\)
\(1 + 8\sqrt{x} + 4\ln |x| + c,\ c\in \mathbb{R}\)

9000065906

Level: 
B
Evaluate the following integral on the interval \((-3,+\infty)\). \[ \int \frac{x^{2} - 9} {x + 3} \, \text{d}x \]
\(\frac{1} {2}x^{2} - 3x + c,\ c\in \mathbb{R}\)
\(\frac{1} {3}x^{3} - 9x +\ln |x + 3| + c,\ c\in \mathbb{R}\)
\(2x - x^{-2} + c,\ c\in \mathbb{R}\)
\(\frac{1} {2}x^{2} + 3x + c,\ c\in \mathbb{R}\)