Answers
The common ratio of this sequence is
#4,-2,1,-1/2,1/4,-1/8,...#
Explanation:
Geometric sequences have a fixed ratio between successive pairs of terms. in the case of this sequence, the common ratio is:
#(-2)/4 = -1/2# .
To find the next term in the sequence just multiply the previous term by the common ratio.
The general term of the sequence can be written:
#a_n = a_1 * r^(n-1)#
where
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