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Alinaalinuzabrainly
a fost răspuns

daca a =5/6 b+c = 7/20 si c-d =1/24 calculați a*b+2*a*c-a*d

Răspuns :

[tex]ab+2ac-ad=ab+ac+ac-ad=a(b+c+c-d)=\\ =\frac{5}{6}(\frac{7}{20}+\frac{1}{24})=\frac{5}{6}(\frac{42}{120}+\frac{5}{120})=\\ =\frac{5}{6}\cdot\frac{47}{120}=\frac{47}{144}[/tex]
Cabac01
a =5/6
b+c = 7/20
c-d =1/24
a*b+2*a*c-a*d=a(b+c+c-d)=5/6 ×(7/20+1/24)=5/6 ×(42+5)/120=(100+47)/120=147/120

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