nth term

[wooden schooner]

Bottom one
Nth term harder

[split sequoia]

8-6n=-58

Rearrange to make n the subject basically solve for n

[acoustic socket]

If n is a positive integer it’s a member of the sequence otherwise it’s not

[split sequoia]

Thanks for adding explanation

[wooden schooner]

So 6n + 8 = 58

[split sequoia]

Nop

8 + 58 = 6n

66 = 6n

n = 11

So it's a whole no.