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# If r s = rs + r + s, then for what value of s is r s equal

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Manager
Joined: 02 Sep 2008
Posts: 103

Kudos [?]: 104 [0], given: 1

If r s = rs + r + s, then for what value of s is r s equal [#permalink]

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05 Apr 2009, 04:28
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100% (00:00) correct 0% (00:00) wrong based on 4 sessions

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15. If r☉s = rs + r + s, then for what value of s is r ☉s equal to r for all values of r?
(A) –1 (B) 0 (C) 1
(D) 1/(r+1) (E) r

Kudos [?]: 104 [0], given: 1

Director
Joined: 04 Jan 2008
Posts: 893

Kudos [?]: 747 [0], given: 17

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05 Apr 2009, 10:39
Clearly (B)
will appreciate if you can Post the OAs after 2-3 responses
thanks
milind1979 wrote:
15. If r☉s = rs + r + s, then for what value of s is r ☉s equal to r for all values of r?
(A) –1 (B) 0 (C) 1
(D) 1/(r+1) (E) r

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Kudos [?]: 747 [0], given: 17

Re: R+S....   [#permalink] 05 Apr 2009, 10:39
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