Question

Daca 20= 2la x × 5la y, atunci x+y = ...... VA ROOG !!! E FOAAARTE URGENTT!!!!

Answer 1

$2^x*5^y=20$

$2^x \ si \ 5^y \ sunt \ factori \ primi.$

$Descompunem \ nr \ 20 \ in \ factori \ primi:$

$20=2^2*5=\textgreater x=2 \ si \ y=1=\textgreater x+y=3$