Răspuns :
Răspuns:
1,3,5,7,9,11,13,15
1+2=3
3+2=5
5+2=7
7+2=9
9+2=11
11+2=13
___________
0,1,4,9,16,25,36,49
0+1=1
1+3=4
4+5=9
9+7=16
16+9=25
_________
1,-1,1,-1,1,-1,1,-1
_________
1,3,6,10,15,21,28,36
1+2=3
3+3=6
6+4=10
10+5=15
15+6=21
21+7=28
18+8=36
Explicație pas cu pas:
a) 11 13 15 numere impare
b) 25 36 49 nr la puterea a doua
c) -1,1,-1 alternativ 1, -1
d) 21 28 36
1+2=3
3+3=6
6+4=10
10+5=15
15+6=21
21+7=28
28+8=36