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Oblicz.
a)
[tex] \sqrt{ \frac{81}{256} } [/tex]
b)
[tex] \sqrt{2.89} [/tex]
c)
[tex] \sqrt[3]{ - \frac{8 }{729} } [/tex]
d)
[tex] \sqrt[3]{0.064} [/tex]
Plsss daje najjj potrzebuje na już! Jsk ktoś wie prosze o odp! ​


Odpowiedź :

Odpowiedź:

[tex]a)\ \ \sqrt{\frac{81}{256}}=\frac{\sqrt{81}}{\sqrt{256}}=\frac{9}{16}\\\\\\b)\ \ \sqrt{2,89}=\sqrt{2\frac{89}{100}}=\sqrt{\frac{289}{100}}=\frac{\sqrt{289}}{\sqrt{100}}=\frac{17}{10}=1\frac{7}{10}\\\\\\c)\ \ \sqrt[3]{-\frac{8}{729}}=-\sqrt[3]{\frac{8}{729}}=-\frac{\sqrt[3]{8}}{\sqrt[3]{729}}=-\frac{2}{9}\\\\\\d)\ \ \sqrt[3]{0,064}=\sqrt[3]{\frac{64}{1000}}=\sqrt[3]{\frac{8}{125}}=\frac{\sqrt[3]{8}}{\sqrt[3]{125}}=\frac{2}{5}[/tex]