(7 la puterea 4 +2×7 la puterea 5 +3×7 la puterea 6):162

Răspuns :

(7^4 + 2× 7^5 + 3 × 7^6) : 162 =

= 7^4(1 + 2×7^1 + 3 × 7^2) : 162 =

= 7^4(1 + 14 + 3 × 49) : 162 =

= 7^4 × (15 + 147) : 162 =

= 7^4 × 162 : 162 =

= 7^4 =

= 2 401

^ putere