6⁻¹⁰ / 81 ⁻² x 32⁻² =
3⁻¹⁰ x 2⁻¹⁰ / (3⁴)⁻² x (2⁵)⁻2 =
3⁻¹⁰ x 2⁻¹⁰ / 3⁻¹² x 2⁻¹⁰ = ( se inverseaza fractiile )
3¹² x 2¹⁰ / 3¹⁰ x 2¹⁰ =
= 3⁽¹²⁻¹⁰⁾ =
3² = 9
(1/5)⁻²⁵ x 25⁻⁶ x 125 ⁻⁴ =
5²⁵ x (5²)⁻⁶ x (5³)⁻⁴ =
5²⁵ x 5⁻¹² x 5⁻¹² =
5²⁵ x 1/5¹² x 1/5¹² =
5²⁵ / 5²⁴ =
5⁽²⁵⁻²⁴) =
5¹ =
5
(10⁻² - 1) ( 10 ⁻² + 1) =
(10⁻²)² - 1² =
10⁻⁴ - 1 =
1/10⁴ - 1 =
1/10000 - 1 =
- 9999/10000
