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Algebra
Pregunta

5. Look at the following sequences and figure out if they re geometric, arithmetic, or neither: If it is geometric, determine the common ratio. If it is orithmetic, determine the common difference. (THIS IS NOT MULTIPLE CHOICE)

a) $$3 , - 6,12 , - 24,48 , \ldots$$

b) $$9 , - 1 , - 11 , - 21 ; - 31 , \ldots$$

c) $$27,9,3,1 , \ldots$$

a)

Geometric sequence

a=3

r=-2

b) Arithmetic sequence

a=9

d=-10

C)

Geometric sequence

a=27

r=1/3

Solución
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