Question

What is the common difference between the elements of the arithmetic sequence below? –18, –22.5, –27, –31.5, –36

Answer 1

Answer:

-4.5

Step-by-step explanation:

Here, a1= (-18)

a2(-22.5)

So, common difference (d) = a2-a1

d= (-22.5) -(-18)

d= (-22.5)+18

d= (-4.5)

Answer 2

Answer:

-4.5

Step-by-step explanation:

first term = a   = -18

second term  = a+d = - 22.5

second term - first term = (a+d)-a = d = -22.5+18 = -4.5

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