Explicação passo-a-passo:
a) 7-⁴ . 7-³ .7-⁶=
7-⁴-³-⁶=
7-¹³
b) 8-⁵ : 2-³ : 4-¹
(2³)-⁵ : 2-³ : (2²)-¹=
2-¹⁵ : 2-³ : 2-²=
2-¹⁵-(-³) : 2-²=
2-¹⁵+³ : 2-²=
2-¹² : 2-²=
2-¹²-(-²)=
2-¹²+²=
2-¹⁰
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Explicação passo-a-passo:
a) 7-⁴ . 7-³ .7-⁶=
7-⁴-³-⁶=
7-¹³
b) 8-⁵ : 2-³ : 4-¹
(2³)-⁵ : 2-³ : (2²)-¹=
2-¹⁵ : 2-³ : 2-²=
2-¹⁵-(-³) : 2-²=
2-¹⁵+³ : 2-²=
2-¹² : 2-²=
2-¹²-(-²)=
2-¹²+²=
2-¹⁰