d)
[tex]5 \sqrt{5} [/tex]
e)
[tex] \frac{27}{7} lub \: 3 \frac{6}{7} [/tex]
Odpowiedź:
d) [tex]5\sqrt{35 } *\frac{1}{7} *\sqrt{7}[/tex] = [tex]5*\sqrt{5}*\sqrt{7} *\frac{1}{7} *\sqrt{7}[/tex] = [tex]5\sqrt{5} *7*\frac{1}{7}[/tex] = [tex]5\sqrt{5}[/tex]
e) [tex](\frac{3\sqrt{21} }{7} )^{2}[/tex] = [tex]\frac{9*21}{7*7} = \frac{9*7*3}{7*7} =[/tex] [tex]\frac{27}{7} = 3\frac{6}{7}[/tex]
Szczegółowe wyjaśnienie:
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d)
[tex]5 \sqrt{5} [/tex]
e)
[tex] \frac{27}{7} lub \: 3 \frac{6}{7} [/tex]
Odpowiedź:
d) [tex]5\sqrt{35 } *\frac{1}{7} *\sqrt{7}[/tex] = [tex]5*\sqrt{5}*\sqrt{7} *\frac{1}{7} *\sqrt{7}[/tex] = [tex]5\sqrt{5} *7*\frac{1}{7}[/tex] = [tex]5\sqrt{5}[/tex]
e) [tex](\frac{3\sqrt{21} }{7} )^{2}[/tex] = [tex]\frac{9*21}{7*7} = \frac{9*7*3}{7*7} =[/tex] [tex]\frac{27}{7} = 3\frac{6}{7}[/tex]
Szczegółowe wyjaśnienie: