Question

daca a supra b = 3 supra 8 , aflati... a) ce procent reprezinta a din b . b) valoarea raportului a la a2a + b la a2a totul supra 2ab

Answer 1

a) a/b=3/8

a%=3*100/8=37.5% din b

b) bancuesc ca cerinta este
$\frac{ a^{2}+ b^{2} }{2ab}$=

=$\frac{ a^{2} }{2ab} + \frac{ b^{2} }{2ab}$=

=$\frac{a}{2b} + \frac{b}{2a} =$

=$\frac{1}{2} * \frac{3}{8} + \frac{1}{2} * \frac{8}{3}$=

=$\frac{3*3}{2*8*3} + \frac{8*8}{2*3*8}$=

=$\frac{9+64}{48}$=

=73/64