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Which of the following is equal to (x+2)!/(x+1)!?

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Math Revolution GMAT Instructor
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Which of the following is equal to (x+2)!/(x+1)!?  [#permalink]

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New post 15 Mar 2017, 02:15
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

95% (00:32) correct 5% (00:50) wrong based on 56 sessions

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Which of the following is equal to (x+2)!/(x+1)!?

A. x-1
B. 1+(1/x)
C. 1
D. x+1
E. x+2

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Re: Which of the following is equal to (x+2)!/(x+1)!?  [#permalink]

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New post 15 Mar 2017, 02:47
Math Revolution GMAT Instructor
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Re: Which of the following is equal to (x+2)!/(x+1)!?  [#permalink]

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New post 19 Mar 2017, 18:01
==> According to n!=n(n-1)!, you get (x+2)!/(x+1)!=(x+2)(x+1)!/(x+1)!=x+2.

Therefore, the answer is E.
Answer: E
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Re: Which of the following is equal to (x+2)!/(x+1)!? &nbs [#permalink] 19 Mar 2017, 18:01
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