Writedown first four terms of a sequence

Question

a₁=-2, a_n=n+3 a_n-1

Answer 1

Just replace the "n" with whatever number is next in the sequence:

For n = 2

a₂=2+3 a_2-1

We also know that a_2-1 = a₁= -2, from the beginning of the problem,

so:

a₂=2+3 (-2)

a₂= -4.

Following similar logic:

a₃= -9

a₄= -23

a₅= -64