Question

What is the common difference of the sequence for -2n + 7?

Answer 1

• Option C

Explanation:

Given sequence:

• aₙ = - 2n + 7

The common difference is the difference between two adjacent points:

• d = aₙ₊₁ - aₙ
• d = - 2(n + 1) + 7 - (-2n + 7) = -2n - 2 + 7 + 2n - 7 = -2

As we see -2 is the coefficient of the variable.

Correct choice is C