👤
a fost răspuns

4 supra 203 + 9 supra 203 + 13 supra 203 + ... + 401 supra 203 =

Răspuns :

Albatran
5/203+9/203+13/203+...+401/203=?

5+9+13+...+401=?
(4*1+1)+(4*2+1)+(4*3+1)+...+(4*100+1)=4(1+2+...+100)+(1+1+...+1) sunt100de 1 in paranteza=
4*100*101/2+100=2*100*101+100=200*101+100=20200+100=20300

atunci toata suma de fractii este 20300/203 =100 





Alte intrebari