Question

5^n+1-5^n-1/2*5^n упростить

Answer 1

$frac{5^{n+1}-5^{n-1}}{2*5^{n}}=frac{5*5^n-frac{1}{5}*5^n}{2*5^{n}}=frac{5^n(5-frac{1}{5})}{2*5^{n}}=frac{5-frac{1}{5}}{2}=frac{24}{5}*frac{1}{2}=frac{12}{5}=2,4$

 

 

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