Respuesta :

the sequence is set of things[ usually numbers] that are in order  
I know that 1/2+1/4+1/8+1/16+... will equal 1

1/2*2 =1

1*2 =2

2+1= 3

if you continue that series, then you get
2+1+1/2+...
2+1+1 =4

Though a more formal way would be something along the lines of

[tex]4=a_0 *\frac{1}{1-r} [/tex]

pick a random a0, and then just solve for r
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