Sagot :
1/9 = 1/(3 × 3)
= 1/3²
= 3⁻²
9³ = (3 × 3)³
= (3²)³
= 3⁶
27 = (3 × 3 × 3)
= 3³
1/81 = 1/(3 × 3 × 3 × 3)
= 1/3⁴
= 3⁻⁴
"3^5/3^2x3" peut vouloir signifier deux écritures :
3⁵/(3² × 3) = 3⁵/3³
= 3⁵⁻³
= 3²
3⁵/3² × 3 = 3⁵⁻² × 3
= 3⁵⁺¹
=3⁶
3 = 3¹
8 × 25³ = 2 × 2 × 2 × 25³
= 2³ × 25³
= (2 × 25)³
= 50³