A

9000065910

Časť: 
A
Je daná funkcia \(F(x) = x + 2\ln |x|-\frac{1} {x}\). Vyberte funkciu \(f\), pre ktorú je \(F\) funkcia primitívna na intervale \((0;+\infty )\).
\(f(x) = \frac{x^{2}+2x+1} {x^{2}} \)
\(f(x) = \frac{x^{2}} {(x+1)^{2}} \)
\(f(x) = \frac{x^{2}-1} {x^{2}} \)
\(f(x) = \frac{x^{2}} {(x-1)^{2}} \)

9000070102

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A
Určte algebraický tvar daného komplexného čísla. \[ \left (\cos \frac{\pi } {3} + \mathrm{i}\sin \frac{\pi } {3}\right )^{10} \]
\(-\frac{1} {2} -\mathrm{i}\frac{\sqrt{3}} {2} \)
\(-\frac{\sqrt{3}} {2} -\frac{1} {2}\mathrm{i}\)
\(-\frac{\sqrt{3}} {2} + \frac{1} {2}\mathrm{i}\)
\(-\frac{1} {2} + \mathrm{i}\frac{\sqrt{3}} {2} \)

9000070105

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A
Určte goniometrický tvar daného komplexného čísla. \[ \mathrm{i}^{13} \]
\(\cos \frac{\pi } {2} + \mathrm{i}\sin \frac{\pi } {2}\)
\(\cos \frac{\pi } {2} -\mathrm{i}\sin \frac{\pi } {2}\)
\(\sin \frac{\pi } {2} + \mathrm{i}\cos \frac{\pi } {2}\)
\(\cos \frac{3\pi } {2} + \mathrm{i}\sin \frac{3\pi } {2}\)

9000069902

Časť: 
A
Vyriešte danú kvadratickú rovnicu v množine komplexných čísel. \[ 3x^{2} + 2x + 2 = 0 \]
\(x_{1} = -\frac{1} {3} + \frac{\sqrt{5}} {3} \mathrm{i}\), \(x_{2} = -\frac{1} {3} -\frac{\sqrt{5}} {3} \mathrm{i}\)
\(x_{1} = -\frac{1} {3}\)
\(x_{1} = \frac{1} {3} + \frac{\sqrt{5}} {3} \), \(x_{2} = \frac{1} {3} + \frac{\sqrt{5}} {3} \)
\(x_{1} = \frac{1} {3} + \frac{\sqrt{5}} {3} \mathrm{i}\), \(x_{2} = \frac{1} {3} -\frac{\sqrt{5}} {3} \mathrm{i}\)