Question

Find the first three terms of the
sequences for which Sn
below
1) Sn=n2(n-1)​

Answer 1

Answer:

so fist three terms are 0,4,14

Step-by-step explanation:

Sn=n²(n-1)​

S1=1(1-1)=0

so a1=0

s2=a1+a2

2²(2-1)=0+a2

4=a2

now S3=3²(3-1)=18

and S3=a1+a2+a3

18=0+4+a3

a3=18-4=14

so fist three terms are 0,4,14