Răspuns :
[tex]n = 10 0+ 2 \times (1 + 2 + 3 + 4 + ... + 99)[/tex]
[tex]n = 100 + 2 \times \frac{99(99 + 1)}{2} [/tex]
[tex]n = 100 + 99(99 + 1)[/tex]
[tex]n = 100 + 99 \times 100[/tex]
[tex]n = 100(1 + 99)[/tex]
[tex]n = 100 \times 100[/tex]
[tex]n = {100}^{2} = > p.p[/tex]
[tex]n = 100 + 2 \times \frac{99(99 + 1)}{2} [/tex]
[tex]n = 100 + 99(99 + 1)[/tex]
[tex]n = 100 + 99 \times 100[/tex]
[tex]n = 100(1 + 99)[/tex]
[tex]n = 100 \times 100[/tex]
[tex]n = {100}^{2} = > p.p[/tex]
n = 100 + 2 × ( 1 + 2 + 3 + 4 + ...... + 99 )
n = 100 + 2 × 99 × ( 1 + 99 ) : 2
n = 100 + 99 × 100
n = 100 × ( 1 + 99 ) → am dat factor comun pe 100
n = 100 × 100
n = 100² → patrat perfect