Răspuns:
1
Explicație pas cu pas:
[tex]\displaystyle\bf\\(3^{1+2+3+...+20}+2*3^{210}):3^{211}[/tex]
[tex]\displaystyle\bf\\1+2+3+...+20=20(20+1):2=10*21=210[/tex]
[tex]\displaystyle\bf\\(3^{210}+2*3^{210}):3^{211}[/tex]
[tex]\displaystyle\bf\\3^{210}+2*3^{210}=3^{210}(2+1)=3^{210}*3^{1}=3^{211}[/tex]
[tex]\displaystyle\bf\\3^{211}:3^{211}=1[/tex]