Răspuns :
Răspuns:
1= 2*0+1
3=2*1+1
....
99=2*49+1
=> 2 (0+1+2+3+...+49)+50 =
2*49*50:2+50=50*49+50=50 (49+1)=50*50=50^2 => patrat perfect
Răspuns:
1+3+5+........+99=100x25 sau 50x50
50x50 = patrat perfect
Răspuns:
1= 2*0+1
3=2*1+1
....
99=2*49+1
=> 2 (0+1+2+3+...+49)+50 =
2*49*50:2+50=50*49+50=50 (49+1)=50*50=50^2 => patrat perfect
Răspuns:
1+3+5+........+99=100x25 sau 50x50
50x50 = patrat perfect