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Simplificati fractia 5 la puterea n+1 +2x5 la puterea n + 5 la puterea n+2 supra 3 la puterea n+2 +2x3 la puterea n+1 + 3 la puterea n pana obtineti fractie ireductibila

Răspuns :

[tex] \frac{5 ^{n+1} + 2*5^{n} + 5^{n+2} }{ 3^{n+2} + 2*3^{n+1} + 3^{n} } [/tex] = 

[tex] \frac{ 5^{n}(5+2+ 5^{2})  }{ 3^{n}( 3^{2} +2+1)} [/tex] = 

[tex] \frac{ 5^{n}(5+2+ 25)  }{ 3^{n}( 9 +2+1)} [/tex] = 

[tex] \frac{ 5^{n} * 32)  }{ 3^{n}* 12} [/tex] =  [tex] \frac{ 5^{n} * 8)  }{ 3^{n}* 3} [/tex] =  [tex] \frac{ 5^{n} * 5+3)  }{ 3^{n}* 3} [/tex] =  [tex] \frac{ 5^{n+1} +3)  }{ 3^{n+1}} [/tex]