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E urgent! Dau coroana
1. Efectuați: a) 1,02+49/50-1,1(6)×3/7 b) (-3/7)⁵×[(-3/7)²]⁴÷(-3/7)¹²​


Răspuns :

Răspuns:

Explicație pas cu pas:

a) 1,02+49/50-1,1(6)×3/7=102/100+49/50-7/6×3/7=51/50+49/50-1/2=

=100/50-1/2=2-1/2=3/2

b)(-3/7)⁵×[(-3/7)²]⁴÷(-3/7)¹²​=(-3/7)⁵×(-3/7)^8:(-3/7)^12=(-3/7)^(5+8-12)=

=(-3/7)^1=-3/7