Question

Determinati numerele x,y,z stiind ca sunt direct proportionale cu 3,4,5 si x•y+y•z+x•y=188 va rog frumos repede dau coroana si multe puncte

Answer 1

x=3k
y=4k
z=5k

3k*4k + 4k*5k + 5k*3k=188
12k^2+20k^2+15k^2=188
47k^2=188
k^2=4
k=2

x=3k = 3*2=6
y=4k = 4*2=8
z=5k = 5*2=10