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# If #x is defined for all x > –2 as the square root of the number that

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Math Expert
Joined: 02 Sep 2009
Posts: 58453
If #x is defined for all x > –2 as the square root of the number that  [#permalink]

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17 Dec 2018, 02:11
2
1
00:00

Difficulty:

25% (medium)

Question Stats:

78% (01:11) correct 22% (01:13) wrong based on 35 sessions

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If #x is defined for all x > –2 as the square root of the number that is 2 more than x, what is the value of #7 - #(-1) ?

A. 0
B. 1
C. 2
D. 3
E. 4

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Re: If #x is defined for all x > –2 as the square root of the number that  [#permalink]

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17 Dec 2018, 03:53
Bunuel wrote:
If #x is defined for all x > –2 as the square root of the number that is 2 more than x, what is the value of #7 - #(-1) ?

A. 0
B. 1
C. 2
D. 3
E. 4

given #x= \sqrt{x+2}

so #7-#(-1) ; \sqrt{7+2[/square_root - [square_root]-1+2}
; 3-1 = 2 IMO C
Re: If #x is defined for all x > –2 as the square root of the number that   [#permalink] 17 Dec 2018, 03:53
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