Odpowiedź:
Zad 5.
[tex]\frac{2}{25}: x = \frac{x}{\frac{2}{9} } \\\frac{2}{25x} = \frac{9x}{2} \\225x^2 = 4\\225x^2 -4 = 0\\(15x-2)(15x+2) = 0 \\[/tex]
[tex]x = \frac{2}{15}[/tex] ∨ [tex]x = \frac{-2}{15}[/tex]
Odp. C
Zad 6.
[tex]\sqrt[3]{2^2*\sqrt{2} } * \sqrt{2} = \sqrt[3]{2^\frac{5}{2} } * 2^\frac{1}{2}= \\= (2^\frac{5}{2} )^\frac{1}{3} * 2^\frac{1}{2} = 2 ^\frac{5}{6} * 2^\frac{1}{2} = 2^\frac{8}{6} = \sqrt[6]{2^8} = \sqrt[3]{2^4} =2\sqrt[3]{2}[/tex]
