Question

What is the equation for an arithmetic sequence with a first term of 7 and a second term of 3? (5 points)

an = 7 − 4(n − 1)

an = 7 + 4(n − 1)

an = 7 − 3(n − 1)

an = 7 + 3(n − 1)

Answer 1

The answer is option A

Explanation:

The solution is in the image

Answer 2

1st option

Explanation:

the equation for an arithmetic sequence is

`a_(n)` = a₁ + (n - 1)d

where a₁ is the first term and d the common difference

here a₁ = 7 and d = a₂ - a₁ = 3 - 7 = - 4 , then

`a_(n)` = 7 - 4(n - 1)