Arithmetic,Geometric

Question

Fill in the blanks below to construct a correct

statement.

The sequences  2000, 1000, 500, 250 is a/an  sequence with a common  of 

Answers: Arithmetic,Geometric , ratio, difference,3,4

Answer 1

common ratio = r = 1/2 = 0.5

It's a geometric sequence

an = a1(r)^(n-1) = 2000(1/2)^(n-1)

a1 = 2000(1/2)^(1-1) = 2000

a2 =2000(1/2)^(2-1) = 1000

a3 = 2000(1/2)^(3-1) = 500

a4 = 2000(1/2)^(4-1) = 250

a5 = 2000(1/2)^(5-1) = 125

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