Question

10 va rog urgent !! Dau 100 de puncte și coronița .

Answer 1

Răspuns

a)m obtinut  alta relatie

b)≅71,43%

c) a=1,75...b=1,3125..c=2,1875

Explicație pas cu pas:

a)

(a+b)/7=(b+c)/8=(c+a)/9=2(a+b+c)/ (7+8+9)=2(a+b+c)/24=(a+b+c)/12=k

(a+b)/7=(a+b+c)/12

12a+12b=7a+7b+7c

7c=5(a+b)

c= 5(a+b)/7

b)

c/(a+b) =5/7=x/100.x=500/7=71,(428571)%

c) a+b+c=3*1,75=5,25

k=5,25/12=0,4375

a+b=7*0,4375=3,0625⇒c=5,25-3,0625=2,1875

b+c=8*0,4375=3,5⇒a=5,25-3,5=1,75

c+a=9*0,4375=3,9375⇒b=5,25-3.9375=1,3125