Question

Find an equation for the nth term of the arithmetic sequence.

-3, -5, -7, -9, ...

Answer 1

I know just add -2 but the answer choices are confusing me
an= -3-2
an= -3 +2(n)
an= -3 + -2( n+1)
an= -3 + -2( n-1)

Answer 2

nthe term of an arithmetic series is a1 + (n - 1)d

where a1 = first term and d = common difference

Answer 3

Thanks @welshfella

Answer 4

yw

Answer 5

its worth remembering that formula