Problem with arithmetic sequence question (1 Viewer)

dv3

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Im having trouble figuring this question out:

Question:

The first three terms of an arithmetic sequence are 7, x, 35. Find x
 

flon

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x-7=35-x

2x=42

x=21
 
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addikaye03

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to further explain the above: they give u the fact that its arithmetic, a sequence is arithmetic if T3-T2=T2-T1, therefore use that to solve for x.

If geometric, T2/T1=T3/T2, same deal
 

dv3

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Last edited:

addikaye03

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flon, you did fuck all, all of a sudden your willing to help others with your unexplained answers, although the path to answering to Q was obvious, explain your answers.
 

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