Question

If a2=-4 and a5=-3 find the first and the sixth term of this arithmetic sequence

Answer 1

an = a1 + d(n-1)

you can shift the indexes to use these to find the sequence with

Answer 2

a2 =-4 a5=-3
a1 a4


an = a1 + d(n-1)
a4 = a1 +d(4-1)

-3 = -4 +d(3) solve for d and reuse the setup