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Re: A sequence in which every term is equal to the sum of its preceding [#permalink]
Carcass wrote:
a(n) = a(n-1) + d

Picking numbers 3,5,7 which is still an AP

Substitute and only A is an AP

For example C

will 5,8,11 which is not an AP

Instead A would be

6,10,14,18.........which are 4 apart in every term

I hope this hleps





thanks
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Re: A sequence in which every term is equal to the sum of its preceding [#permalink]
Carcass, can you please explain how you can get this sequence from A. 2a,2b,2c,2d,2e'?

6,10,14,18.........
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Re: A sequence in which every term is equal to the sum of its preceding [#permalink]
Expert Reply
An arithmetic progression is a serie in which every term and the afterward os constant on the number line

I used as example 3,5,7

Now, insertig such numbers in the answer choices you must have back another AP

In A

2*3=6
2*5=10
2*7=14

this is an AP and the distance between numbers is 4

I hope now is clear
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Re: A sequence in which every term is equal to the sum of its preceding [#permalink]
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