Question

Which arithmetic sequence has a first term equal to 47 and a common difference of -18?

a.{-18, -65, -112, -159, …}

b.{47, 29, 11, -7, …}

c.{-18, 29, 76, 123, …}

d.{47, 65, 83, 101, …}

Answer 1

Answer:

b

Step-by-step explanation:

There are 2 sequences with a₁ = 47, b and d

The common difference of both is

(b)

d = a₂ - a1 = 29 - 47 = - 18

(d)

d = a₂ - a₁ = 65 - 47 = 18

The the sequence with first term 45 and common difference - 18 is b