Răspuns:
Explicație pas cu pas:
a)
3⁷⁷ : (3⁵ × 3¹⁰)⁵ + 5 × (352 - 350 : 2)
= 3⁷⁷ : (3¹⁵)⁵ + 5 × (352 - 175)
= 3⁷⁷ : 3⁷⁵ + 5 × 177
= 3² + 885
= 9 + 885
= 894
b)
3³⁹ : (3² × 3³³) × (3² + 3 × 25) : 21
= 3³⁹ : 3³⁵ × (9 + 75) : 21
= 3³ × 84 : 21
= 27 × 84 : 21
= 2 268 : 21
= 108
c)
3³ + 3¹⁰ : 3⁸ × 3 + 3 × 3⁷ : 3⁵ + 3¹⁰ : (2 × 3⁵ + 3⁵) + 9 × 3³
= 3³ + 3³ + 3³ + 3¹⁰ : (3 × 3⁵) + 3² × 3³
= 3³ + 3³ + 3³ + 3¹⁰ : 3⁶ + 3⁵
= 3³ + 3³ + 3³ + 3⁴ + 3⁵
= 3 × 3³ + 3⁴ + 3⁵
= 3⁴ + 3⁴ + 3⁵
= 2 × 3⁴ + 3⁵
= 2 × 3⁴ + 3 × 3⁴
= (2 + 3) × 3⁴
= 5 × 81
= 405
