👤

efectuati dand factor comun (7^10-7^9):(7^9-7^8)

Răspuns :

(7^10-7^9):(7^9-7^8) =
=7^9(7^1-7^0) :7^8(7^1-7^0) =
=7^9(7-1) :7^8(7-1) =
=7^9 *6 :7^8 * 6 =
=7^9 :7^8  = 7