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Simplificati fractia: 3^n+2 * 5^n+1 supra 15^n+1

Răspuns :

[tex]\frac{3^{n+2}\cdot5^{n+1}}{15^{n+1}}=[/tex]
[tex]=\frac{3^{n+1}\cdot3\cdot5^{n+1}}{15^{n+1}}=[/tex]
[tex]=\frac{15^{n+1}\cdot3}{15^{n+1}}=[/tex]
[tex]=\frac{3}{1}=3[/tex]