Answer:
[tex]t_{4}=20[/tex]
Step-by-step explanation:
Given:
The [tex]n^{th}[/tex] term of the sequence is given as:
[tex]t_{n}=n^{2}+n[/tex]
In order to find the fourth term of this sequence, we need to plug in 4 for [tex]n[/tex] in the above expression and solve. This gives,
[tex]t_{4}=4^{2}+4\\t_{4}=16+4=20[/tex]
Therefore, the fourth term of the sequence is [tex]t_{4}=20[/tex].
