Question

fie numarul a,b,c astfel incat b=2a,3b=2c,4c=3d.a)verificati daca:b²=a×d.b)aflati numarul daca:a+b+c+d=48​

Answer 1

Răspuns:

b=2a  

3b=2c  3b=3*2a=6a    2c= 6a   => c= 3a

4c=3d    4c=2*6a=12a    

3d=12a   => d= 12a:3= 4a

a)$b^{2}$= axd= ax4a=4$a^{2}$   adevarat

2a*2a=4$a^{2}$  

b) a+b+c+d=48

a+2a+3a+4a= 48

8a=48   a= 48:8  a= 6   b= 2*6=12   c= 3*6 =18  d=4*6=24