Question

Find a formula for an for the arithmetic sequence.

Answer 1

Answer:

$a_{n} = a + 2(n-1)$

Step-by-step explanation:

$a_{5}= a_{1} + 4d \\4 = -4 +4d\\8= 4d\\d= 2\\\\Therefore \\a_{n} = a_{1} + 2(n-1)$