Question

04. Observe cada PG, calcule a razão e classifique-a: Exemplo: PG (1, 2, 4, 8, ...) q = 2, crescente
a) PG (3, 6, 12, 24, ...)
b) PG (-64,- 32, - 16, ...)
c) PG (6, 6, 6, 6, ...)
d) PG (5,- 10, 20, -40, ...)
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Answer 1

Explicação passo a passo:

a)

PG (3, 6, 12, 24, ...)

q = a2/a1 = a3/a2

q = 6/3 = 12/6

q = 2 >>>> > crescente

b)

PG (-64,- 32, - 16, ...)

-32/ -64 = - 16/-32

+1/2 = + 1/2 razão q >>>>crescente

c)

PG (6, 6, 6, 6, ...)

6/6 = 6/6

razão q = 1 >>>>> constante

d)

PG (5,- 10, 20, -40, ...)

-10/5 = 20/-10

-2 = -2>>>> razão q = - 2 >>>> decrescente