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Ex 2...a)....Vă rog dau coroană

Ex 2aVă Rog Dau Coroană class=

Răspuns :

(7/10+1/4+2³/40)×(7/2-3/8)×(1-2/3)²=
=(7/10+1/4+8/40)×(28-3)/8)×(1/3)²=
=(7/10+1/4+1/5)×25/8×1/9=
=(14+5+4)/20×25/8×1/9=
=23/20×25/8×1/9=
=23/4×5/8×1/9=
=115/288