Usměrnění zlomků
Usměrni zlomky:
\large \Large \frac{{20}}{{\sqrt 7+1}}\large
\large = \Large \frac{{20\cdot \left( {\sqrt 7-1} \right) }}{3}\large
\large = \Large \frac{{10\cdot \left( {\sqrt 7+1} \right) }}{3}\large
\large = \Large \frac{{10\cdot \left( {\sqrt 7-1} \right) }}{5}\large
\large = \Large \frac{{10\cdot \left( {\sqrt 7-1} \right) }}{3}\large
Tvým úkolem je zbavit se odmocniny ve jmenovateli. Všimni si, že ve jmenovateli už nemáš pouhou jednu odmocninu, ale součet odmocniny s číslem 1. Tento příklad ti ukáže, jak v takové situaci postupovat.
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