Question

Will give 25 points and Brainliest to the correct answer

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

9, 11, 13, 15, ...

Answer Choices
A) an = 9 + 2(n - 1)
B) an = 9 + 2(n + 1)
C) an = 9 + 2
D) an = 9 + 2(n)

Answer 1

9+2 is a great start but you can not go on after that because there's not a term to change the number after adding 2.
The answer is
A) an = 9+ 2(n-1)
Because when you plug in numbers from 0 to 4, you get the following numbers in their correct sequence.
9+ 2(0-1)= 7
9+ 2(1-1)= 9
9+ 2(2-1)= 11
9+ 2(3-1)= 13
9+ 2(4-1)= 15