Question

Calcule o valor da expressão n(n-3)/ 2 para :
a) n=4
b) n=5
c) n=6
d) n=3

Answer 1

n=4
4(4-3)/2=
4.1/2=
4/2=
2

n=5
5(5-3)/2=
5.2/2=
10/2=
5

n=6
6.(6-3)/2=
6.3/2=
18/2=
9

n=3
3.(3-3)/2=
3.0/2=
0/2=
0