Răspuns :
direct proportionale : cand unul creste si celalalt creste (sau scade)
invers proportionale : cand unul creste celalalt scade
invers proportionale : cand unul creste celalalt scade
direct propprtional (dp)
a+b+c=120
ex {a,b,c!}dp {1,2,3,}
a_(supra)1=b_2=c_3=k
a_1=k=>(rezulta)a=1k
b_2=k=>b=2k
c_3=k=>c=3k
acum inlocuim:
1k+2k+3k=120
6k=120
k=120:6=20
a=20×1k=20
b=20×2k=40
c=20×3k=60
proba:20+40+60=120
a+b+c=120
ex {a,b,c!}dp {1,2,3,}
a_(supra)1=b_2=c_3=k
a_1=k=>(rezulta)a=1k
b_2=k=>b=2k
c_3=k=>c=3k
acum inlocuim:
1k+2k+3k=120
6k=120
k=120:6=20
a=20×1k=20
b=20×2k=40
c=20×3k=60
proba:20+40+60=120