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20. Calculaţi:
a)radical din1/16:(radical4/9+radical49/36-radical9/144)


Răspuns :

Răspuns:

[tex]\sqrt\frac{1}{16} [/tex][tex]:(\sqrt \frac{4}{9} +\sqrt \frac{49}{36} -\sqrt \frac{9}{144} [/tex][tex])=\frac{1}{4} :(\frac{2}{3} +\frac{7}{6} -\sqrt \frac{1}{16} )[/tex][tex]=\frac{1}{4}:(\frac{2}{3}+\frac{7}{6}-\frac{1}{4})=\\ [/tex][tex]\frac{1}{4}:\frac{19}{12} =\frac{1}{4}*\frac{12}{19}=\frac{3}{19} [/tex]