a) a/b=3/8
a%=3*100/8=37.5% din b
b) bancuesc ca cerinta este
[tex] \frac{ a^{2}+ b^{2} }{2ab} [/tex]=
=[tex] \frac{ a^{2} }{2ab} + \frac{ b^{2} }{2ab} [/tex]=
=[tex] \frac{a}{2b} + \frac{b}{2a} =[/tex]
=[tex] \frac{1}{2} * \frac{3}{8} + \frac{1}{2} * \frac{8}{3} [/tex]=
=[tex] \frac{3*3}{2*8*3} + \frac{8*8}{2*3*8} [/tex]=
=[tex] \frac{9+64}{48} [/tex]=
=73/64
