Question

12. Determine a razão das P.G.:
a) (4, 12, 36, 108, ...)
b) (-3,-15, -75,- 375,...)
c) (-1 000,-100,-10,-1,...)
d) (-4,-4, -4,-4,...)
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Answer 1

Explicação passo-a-passo:

12. Determine a razão das P.G.:

a) (4, 12, 36, 108, ...)

$a) \: r = \frac{12}{4} = \frac{36}{12} = \frac{108}{36} \\ r = 3 \\ b) \: r = \frac{ - 15}{ - 3} = \frac{ - 75}{ - 15} = \frac{ - 375}{ - 75} \\ r = 5 \\ c) \: r = \frac{ - 100}{ - 1000} = \frac{ - 10}{ - 100 } = \frac{ - 1}{ - 10} \\ r = \frac{1}{10} \\ ajudou$

b) (-3,-15, -75,- 375,...)

c) (-1 000,-100,-10,-1,...)

d) (-4,-4, -4,-4,...)