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Warum kommt bei (7/32)^4*8^4 gleich 2401/256 raus? (Rechenweg)

 17.11.2014

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 #1
avatar+14538 
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$${\left({\frac{{\mathtt{7}}}{{\mathtt{32}}}}\right)}^{{\mathtt{4}}} = {\mathtt{0.002\: \!289\: \!772\: \!033\: \!691\: \!4}}$$       ;       $${{\mathtt{8}}}^{{\mathtt{4}}} = {\mathtt{4\,096}}$$

 

$${\left({\frac{{\mathtt{7}}}{{\mathtt{32}}}}\right)}^{{\mathtt{4}}}{\mathtt{\,\times\,}}{{\mathtt{8}}}^{{\mathtt{4}}} = {\frac{{\mathtt{2\,401}}}{{\mathtt{256}}}} = {\mathtt{9.378\: \!906\: \!25}}$$

 

$${\left({\frac{\left({\mathtt{7}}{\mathtt{\,\times\,}}{\mathtt{8}}\right)}{{\mathtt{32}}}}\right)}^{{\mathtt{4}}} = {\frac{{\mathtt{2\,401}}}{{\mathtt{256}}}} = {\mathtt{9.378\: \!906\: \!25}}$$       =     $${\left({\frac{{\mathtt{7}}}{{\mathtt{4}}}}\right)}^{{\mathtt{4}}} = {\frac{{\mathtt{2\,401}}}{{\mathtt{256}}}} = {\mathtt{9.378\: \!906\: \!25}}$$

 

$${\frac{{{\mathtt{7}}}^{{\mathtt{4}}}}{{{\mathtt{4}}}^{{\mathtt{4}}}}} = {\frac{{\mathtt{2\,401}}}{{\mathtt{256}}}} = {\mathtt{9.378\: \!906\: \!25}}$$

 

Man kann die Potenzen mit gleichem Exponenten zusammenfassen und in der Klammer kann dann durch 8 gekürzt werden.

 

Gruß radix !

 17.11.2014
 #1
avatar+14538 
+5
Beste Antwort

$${\left({\frac{{\mathtt{7}}}{{\mathtt{32}}}}\right)}^{{\mathtt{4}}} = {\mathtt{0.002\: \!289\: \!772\: \!033\: \!691\: \!4}}$$       ;       $${{\mathtt{8}}}^{{\mathtt{4}}} = {\mathtt{4\,096}}$$

 

$${\left({\frac{{\mathtt{7}}}{{\mathtt{32}}}}\right)}^{{\mathtt{4}}}{\mathtt{\,\times\,}}{{\mathtt{8}}}^{{\mathtt{4}}} = {\frac{{\mathtt{2\,401}}}{{\mathtt{256}}}} = {\mathtt{9.378\: \!906\: \!25}}$$

 

$${\left({\frac{\left({\mathtt{7}}{\mathtt{\,\times\,}}{\mathtt{8}}\right)}{{\mathtt{32}}}}\right)}^{{\mathtt{4}}} = {\frac{{\mathtt{2\,401}}}{{\mathtt{256}}}} = {\mathtt{9.378\: \!906\: \!25}}$$       =     $${\left({\frac{{\mathtt{7}}}{{\mathtt{4}}}}\right)}^{{\mathtt{4}}} = {\frac{{\mathtt{2\,401}}}{{\mathtt{256}}}} = {\mathtt{9.378\: \!906\: \!25}}$$

 

$${\frac{{{\mathtt{7}}}^{{\mathtt{4}}}}{{{\mathtt{4}}}^{{\mathtt{4}}}}} = {\frac{{\mathtt{2\,401}}}{{\mathtt{256}}}} = {\mathtt{9.378\: \!906\: \!25}}$$

 

Man kann die Potenzen mit gleichem Exponenten zusammenfassen und in der Klammer kann dann durch 8 gekürzt werden.

 

Gruß radix !

radix 17.11.2014

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