Derivative

9000070704

Level: 
B
Differentiate the following function. \[ f(x) = \frac{1} {\cos x + 3x^{2}} \]
\(f^{\prime}(x) = \frac{\sin x-6x} {(3x^{2}+\cos x)^{2}} ;\ x\in \mathbb{R}\)
\(f^{\prime}(x) = \frac{6x-\sin x} {(3x^{2}+\cos x)^{2}} ;\ x\in \mathbb{R}\)
\(f^{\prime}(x) = \frac{\sin x-6x} {3x^{2}+\cos x};\ x\in \mathbb{R}\)
\(f^{\prime}(x) = \frac{6x-\sin x} {3x^{2}+\cos x};\ x\in \mathbb{R}\)

9000070706

Level: 
B
Differentiate the following function. \[ f(x) = \sqrt{x^{2 } + 3x} \]
\(f^{\prime}(x) = \frac{2x+3} {2\sqrt{x^{2 } +3x}};\ x\in \left (-\infty ;-3\right )\cup \left (0;\infty \right )\)
\(f^{\prime}(x) = \frac{2x+3} {2\sqrt{x^{2 } +3x}};\ x\in \left (-\infty ;-3\right ] \cup \left [ 0;\infty \right )\)
\(f^{\prime}(x) = \frac{2x+3} {\sqrt{x^{2 } +3x}};\ x\in \left (-\infty ;-3\right )\cup \left (0;\infty \right )\)
\(f^{\prime}(x) = \frac{\sqrt{x^{2 } +3x}} {2x+3} ;\ x\in \left (-\infty ;-3\right ] \cup \left [ 0;\infty \right )\)

9000070707

Level: 
B
Differentiate the following function. \[ f(x) = \root{5}\of{x^{2} - 7x} \]Remark: The function \(f\colon y = \root{5}\of{x}\) is defined for \(x\in \left < 0;\infty \right )\).
\(f^{\prime}(x) = \frac{2x-7} {5(x^{2}-7x)^{\frac{4} {5} }} ;\ x\in \left (-\infty ;0\right )\cup \left (7;\infty \right )\)
\(f^{\prime}(x) = \frac{2x-7} {5(x^{2}-7x)^{\frac{4} {5} }} ;\ x\in \left (-\infty ;0\right ] \cup \left [ 7;\infty \right )\)
\(f^{\prime}(x) = (2x - 7)\root{4}\of{x^{2} - 7x};\ x\in \left (-\infty ;0\right )\cup \left (7;\infty \right )\)
\(f^{\prime}(x) = (2x - 7)\root{4}\of{x^{2} - 7x};\ x\in \left (-\infty ;0\right ] \cup \left [ 7;\infty \right )\)

9000070803

Level: 
A
Differentiate the following function. \[ f(x) = 3x^{3} + 2x +\mathrm{e} ^{x} \]
\(f'(x) = 9x^{2} + 2 +\mathrm{e} ^{x};\ x\in \mathbb{R}\)
\(f'(x) = 6x^{2} + 2x;\ x\in \mathbb{R}\)
\(f'(x) = 6x^{2} + 2x +\mathrm{e} ^{x};\ x\in \mathbb{R}\)
\(f'(x) = 9x^{2} + 2;\ x\in \mathbb{R}\)

9000063303

Level: 
C
Differentiate the following function. \[ f(x) = \sqrt{\sin x} \]
\(f'(x) = \frac{\cos x} {2\sqrt{\sin x}},\ x\in \mathop{\mathop{\bigcup }}\nolimits _{k\in \mathbb{Z}}\left (2k\pi ;\pi + 2k\pi \right )\)
\(f'(x) = \frac{\sin x} {2\sqrt{\cos x}},\ x\in \mathop{\mathop{\bigcup }}\nolimits _{k\in \mathbb{Z}}\left (2k\pi ; \frac{\pi } {2} + 2k\pi \right )\)
\(f'(x) = \frac{1} {2\sqrt{\sin x}},\ x\in \mathop{\mathop{\bigcup }}\nolimits _{k\in \mathbb{Z}}\left (2k\pi ;\pi + 2k\pi \right )\)
\(f'(x) = \frac{\cos x} {2\sqrt{\sin x}},\ x\in \mathop{\mathop{\bigcup }}\nolimits _{k\in \mathbb{Z}}\left [ 2k\pi ; \frac{\pi } {2} + 2k\pi \right ] \)

9000063305

Level: 
C
Differentiate the following function. \[ f(x) = \sqrt{\frac{x - 1} {x + 1}} \]
\(f'(x) = \frac{1} {(x+1)^{2}} \sqrt{\frac{x+1} {x-1}},\ x\in (-\infty ;-1)\cup (1;\infty )\)
\(f'(x) = \frac{\sqrt{x-1}} {(x-1)^{2}\sqrt{x+1}},\ x\in (-\infty ;-1)\cup [ 1;\infty )\)
\(f'(x) = \frac{x-1} {2\sqrt{(x+1)^{3}}} ,\ x\neq - 1\)
\(f'(x) = \frac{x-1} {\sqrt{(x+1)^{3}}} ,\ x\in (-\infty ;-1)\cup [ 1;\infty )\)

9000063306

Level: 
C
Differentiate the following function. \[ f(x) =\mathrm{e} ^{\sin 2x} \]
\(f'(x) = 2\mathrm{e}^{\sin 2x}\cos 2x,\ x\in \mathbb{R}\)
\(f'(x) = x\mathrm{e}^{\sin 2x}\cos 2x,\ x\in \mathbb{R}\)
\(f'(x) =\mathrm{e} ^{\sin 2x}\sin 2x,\ x\in \mathbb{R}\)
\(f'(x) =\mathrm{e} ^{\cos 2x},\ x\in \mathbb{R}\)