sergegr
Which of the following is equivalent to ?



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sergegr
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justindrake
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1/(x  1)  x/(x  1) =
(1  x)/(x  1) =
(x  1)/(x  1) =
1
Answer is B.

sergegr
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26
39
40
30
those are the choices

justindrake
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40 and 30 :D

sergegr
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you can only pick one though

msayer3
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so for the summation, you go from n = 3 to 5  3, 4 and 5. you put those numbers in the expression they give you and add them up

sergegr
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thanks!

justindrake
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30 dude its 30

Chlorophyll
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= 3* 12 + 3
= 36 + 3 = ...

msayer3
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shouldn't it be 39? not 30?