13.calculați:
a) ( -1 ) × ( -1 )² × ( -1 )³ × ( -1 )⁴ × .... ( -1 )²⁰¹⁹ = ?
b) ( -2 ) × ( -2 )² × ( -2 )³ × ( -2 )⁴ × .... × ( -2 )¹⁰⁰: 4²⁵²⁵ = ?
c) ( -10 )¹⁰ : ( -10 )⁹ × ( -9 )⁸ : ( -9 )⁷ × ( -7 )⁶ : ( -7 )⁵ × ( -5 )⁴ : ( -5 )³ × ( -3 )² : ( -3 ) = ?


13calculația 1 1 1 1 1 B 2 2 2 2 2 4 C 10 10 9 9 7 7 5 5 3 3 class=