Question

Find the first three terms of the sequence below. T n = 3 n^2 − 4 n − 3

Answer 1

Answer:The given sequence is T  

n

​  

=n  

2

+4 where T  

n

​  

=200.

Substitute T  

n

​  

=200 in the sequence T  

n

​  

=n  

2

+4 as follows:

T  

n

​  

=n  

2

+4

⇒200=n  

2

+4

⇒n  

2

=200−4=196

⇒n  

2

=196

⇒n=  

196

​  

=14

Hence, n=14

Answer 2

Answer:

Thus, the first three terms of the sequence defined by an = n2 + 1 are 2, 5 and 10.