Răspuns :

Răspuns:

(2/7)¹⁸ :[(2/7)⁷]² x [(2/7)³]⁵ :(2/7)¹⁹=

(2/7)¹⁸:(2/7)⁷ˣ²·(2/7)³ˣ⁵:(2/7)¹⁹=

(2/7)¹⁸:(2/7)¹⁴·(2/7)¹⁵:(2/7)¹⁹=

(2/7)¹⁸⁻¹⁴⁺¹⁵⁻¹⁹=

(2/7)⁰=1