Răspuns :
Răspuns:
1+3+5+...+2009-(1+3+5+...+9)
*1004²-1)-(4²-1)=1004²-4²
Răspuns:
11+13+15+....+2009=?
nr.termeni=(2009-11):2+1=
1998:2+1=
999+1=
1000
Suma=(2009+11)•1000:2=
(2020•1000):2=
2020000:2=
1.010.000
Suma Gauss
Răspuns:
1+3+5+...+2009-(1+3+5+...+9)
*1004²-1)-(4²-1)=1004²-4²
Răspuns:
11+13+15+....+2009=?
nr.termeni=(2009-11):2+1=
1998:2+1=
999+1=
1000
Suma=(2009+11)•1000:2=
(2020•1000):2=
2020000:2=
1.010.000
Suma Gauss