Răspuns :
6^n + 6^n+3 = 217 × 6^55
6^n + 6^n × 6^3 = 217 × 6^55
6^n × ( 1 + 6^3) = 217 × 6^55
6^n × ( 1 + 216) = 217 × 6^55
6^n × 217 = 217 × 6^55 | : 217
6^n = 6^55
n = 55
______
^ = semnul puterii
6^n = 6 la puterea n
6^n + 6^n × 6^3 = 217 × 6^55
6^n × ( 1 + 6^3) = 217 × 6^55
6^n × ( 1 + 216) = 217 × 6^55
6^n × 217 = 217 × 6^55 | : 217
6^n = 6^55
n = 55
______
^ = semnul puterii
6^n = 6 la puterea n
6ⁿ + 6ⁿ⁺³ = 217 x 6⁵⁵
6ⁿ x 1 + 6ⁿ x 6³ = 217 x 6⁵⁵
6ⁿ x ( 1 + 6³ ) = 217 x 6⁵⁵
6ⁿ x ( 1 + 216 ) = 217 x 6⁵⁵
6ⁿ x 217 = 217 x 6⁵⁵ l : 217