Question

va rog mult dau coroana​

Answer 1

Răspuns:

Explicație pas cu pas:

$\bf A=3^n + 3^{n+2} +3^{n+4}$

$\bf A=3^n\cdot\Big(3^{n-n}+3^{n+2-n}+3^{n+4-n}\Big)$

$\bf A=3^n\cdot\Big(3^{0}+3^{2}+3^{4}\Big)$

$\bf A=3^n\cdot\Big(1+9+81\Big)$

$\bf A=3^n\cdot 91$

$\bf A=3^n\cdot 7\cdot 13$

$\red{\boxed{\bf A=3^n\cdot 7\cdot 13~~\vdots~~13}}$

$==pav38==$