Question

Which of the following is an arithmetic sequence?

Answer 1

is equal to zero if. a) a, b, c are in arithmetic progression ... progression. d) α is a root of the equation ax2 + bx + c = 0.Missing: 4,

Answer 2

Answer: Choice A)  -4, -2, 0, 2

Explanation:

This is because we are adding the same thing to each term to get the next term. That is the common difference d = 2

• second term = (first term)+d = -4+2 = -2
• third term = (second term)+d = -2+2 = 0
• fourth term = (third term)+d = 0+2 = 2