👤

(2 la puterea 2n+1 * 5 la puterea n + 4 la puterea n * 5 la puterea n + 2 ) : 20 =?

Răspuns :

(2²ⁿ⁺¹x5ⁿ+4ⁿx5ⁿ⁺²):2²x5=[(2²ⁿx2x5ⁿ)+(2²ⁿx5ⁿx5²)]/2²x5
[2²ⁿx5ⁿ(2+25)]/2²x5
27x2²ⁿx5ⁿ:2²x5
27x2²ⁿ⁻²x5ⁿ⁻¹
27x(2ⁿ⁻¹)²x5ⁿ⁻¹