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Matei013
a fost răspuns

A*b=5/12
A*c=9/20
A*d=7/15
A*(b+c+d)=?
A*(b+C-d)=?
Am nevoie urgent.

Răspuns :

A*b=5/12
A*c=9/20
A*d=7/15
A*(b+c+d)=?
A*(b+C-d)=?

A*(b+c+d)=
A*b+A*c+A*d=
5/12+9/20+7/15=
numitor comun=3x4x5=60

(5x5+9x3+7x4)/60=
(25+27+28)x60=80/60=4/3

A*(b+C-d)=
A*b+A*c-A*d=
5/12+9/20-7/15=
(25+27-28)x60=24/60=2/5

Alte intrebari