Question

Suma nr naturale pare de la 2 la 1000?

Answer 1

2+4+6+....+1000=
n=(1000-2):2+1
n=998:2+1
n=500
S=(1000+2)•500:2
S=1002•500:2
S=501 000:2
S=250 500
Răspuns:250 500
sper că te-am ajutat

Answer 2

2+4+6+.....+1000=2(1+2+3+.....+500)=2 x 500 x 501/2=500x501=250500
aplicam formula pt suma nr nat de la la n  n(n+1)/2