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(7•9)totul la 223:(7la222•9la221)

Răspuns :

(7×9)^223 :(7^222 × 9^221) =

= (7^223 × 9^223) :(7^222 × 9^221) =

= 7^(223-222)× 9^(223-221) =

= 7^1 × 9^2 =

= 7 × 81 =

= 567