Răspuns :
9^2017 = 9 x 9^2016 = (8+1) x 9^2016 = 8 x 9^2016 + 1 x 9^2016 = 2^3 x (9^672)^3 + (9^1008)^2 = (2x9^672)^3 + (9^1008)^2
9²⁰¹⁷ =
= 9 · 9²⁰¹⁶
= (8+1) x 9²⁰¹⁶
= 8 · 9²⁰¹⁶ + 9²⁰¹⁶
= 2³ · 9⁶⁷²⁾³ + 9¹⁰⁰⁸⁾²
= 2·9⁶⁷²⁾³ + 9¹⁰⁰⁸⁾²
= 9 · 9²⁰¹⁶
= (8+1) x 9²⁰¹⁶
= 8 · 9²⁰¹⁶ + 9²⁰¹⁶
= 2³ · 9⁶⁷²⁾³ + 9¹⁰⁰⁸⁾²
= 2·9⁶⁷²⁾³ + 9¹⁰⁰⁸⁾²