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just knowledge of one information can help u immensely while u solve thisvaivish wrote:82. If k^(xy)=1, where k is not zero, which of the following must be true?
I. k=1
II. x=0
III. y=0
(A) I only
(B) II only
(C) III only
(D) I and II
(E) None
Oa is e.
sudhir3127 wrote:just knowledge of one information can help u immensely while u solve thisvaivish wrote:82. If k^(xy)=1, where k is not zero, which of the following must be true?
I. k=1
II. x=0
III. y=0
(A) I only
(B) II only
(C) III only
(D) I and II
(E) None
Oa is e.
n^0 = 1 ( where is n non zero)
k^xy =1 where k #0
means either X has to be zero or Y has to be zero or both zero.
none of the options mentions that.
hence E.
hope that helps..
ur right on the logic.. but still we dont have any option with that .... hence E good find...mehravikas wrote:But k could be 1 and both x and y also 1.
In that case also, k^xy = 1.
sudhir3127 wrote:just knowledge of one information can help u immensely while u solve thisvaivish wrote:82. If k^(xy)=1, where k is not zero, which of the following must be true?
I. k=1
II. x=0
III. y=0
(A) I only
(B) II only
(C) III only
(D) I and II
(E) None
Oa is e.
n^0 = 1 ( where is n non zero)
k^xy =1 where k #0
means either X has to be zero or Y has to be zero or both zero.
none of the options mentions that.
hence E.
hope that helps..
