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13-06-2017
Mathematics

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find the common ratio of the sequence -172, -86, -43, -21.5

Respuesta :

13-06-2017

Common ratio means that you will be multiplying from the first number to get the second number.
To find the ratio we will work backwards, from right to left, and divide instead of multiply.
-43/-21.5 = 1/2
-86/-43= 1/2
-182/-86 = 1/2
r = 1/2

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