Question

Inventati 2 sume ale lui Gauss si rezolvati-le.
Dau coroana!​

Answer 1

1. 1+2+3+.......+6=6×7:2=42:2=21

2. 1+2+3+.......+1 234=1 234×1 235:2=1 523 990:2=761 995

Answer 2

Salut!

Răspuns:

a)2+4+6+....+20=?

b)1+2+3+..+50=?

Explicație pas cu pas:

✳Formula Sumei Gauss:

n·n+1/2

a) 2+4+6+...+20=

2×(1+2+3+....+10)

2×(10×11/2)=

2×(110/2)=

2×55=

110.

b) 1+2+3+....+50=

(50×51)/2=

2550/2=

1275.