Stim ca b=2a, 3b=2c, 4c=3d.
a)
ad=[tex] \frac{b}{2} * \frac{4c}{3} [/tex] = [tex] \frac{b}{2} * \frac{4}{3} * \frac{3b}{2} [/tex] = b²
b)a+b+c+d=48
c= [tex] \frac{3b}{2} [/tex] = [tex] \frac{3}{2} *[/tex]2a = 3a
d=[tex] \frac{4}{3} c[/tex]=[tex] \frac{4}{3} * \frac{3}{2} [/tex]*b=2b=4a
=>a+ 2a+3a+4a=48
10a=48
a=4.8
b=9.6
c=14.4
d=19.2
