Question

Find the sequence whose general term is n(n-1)/2

Answer 1

Answer:

0,1,3,6,10,15,21,28 and so on

Step-by-step explanation:

for n=1

a1 : 0

n=2

a2 : 1

n=3

a3 : 3

n=4

a4 : 6

n = 5

a5 : 10

so

the sequence is :

0,1,3,6,10,15,21,28 and so on