Question

dau coroana vă rog frumos​

Answer 1

Răspuns:

Explicație pas cu pas:

a = 1/3 +13/6 -1/2 = (2+13-3)/6 = 7/6

b = 16/5 +7/5 -16/3 = (3*16+7*3 -5*16)/15

  = (48 +21 -80)/15 = (69 -80)/15 = -11/15

c = 31/6 -28/9 -2/9 = (3*31 -2*28 -2*2)/18

  = (93 -56 -4)/18 = 33/18 = 11/6

1. a+b-c = 7/6 -11/15 -11/6 = (5*7 -2*11 -6*11)/30

             = (35 -88)/30 = -53/30

2. a-c+(1+b) = a+b-c + 1 = -53/30 + 1

                   = (-53 +30)/30 = -23/30

etc.