Question

Exercitiul 9 sau 10.. la alegere!!Multumesc anticipat.

Answer 1

10) a)[1/3+1/3:(1-1/3)]:3/2=
=        [1/3+1/3:2/3];3/2=
       =[1/3+1/3*3/2]:3/2=   
      =[1/3+3/6]:3/2=
       =[1/3+1/3]*2/3=
      =2/3*2/3=4/9
b) 28/31*[1/4+(2int1/2-7/4):7/8]=
  =28/31*[1/4+(5/2-7/4):7/8]=
   =28/31*[1/4+3/4*8/7]=
  =28/31*[1/4+6/7]=
=28/31*[7/28+24/28]=
 =28/31*31/28=1

Answer 2

10) si
  9) a); b) si c) .....................