hazeljj wrote:
Bunuel wrote:
I have edited the question and the solution by adding more details to enhance its clarity. I hope it is now easier tounderstand.
HiBunuel , I think there is an error in your explanation.
In explanation for (1), you mentioned that when b is negative, for a^b to be positive, a must be an even number, whether negative or positive. That statement is wrong. For a^b to be positive when b is negative, a needs to be positive; it does not need to be an even number. However, if you are trying to further explain what values a can take for b^a to be positive given that b is negative, then yes a just needs to be even regardless of polarity. If you read on, your examples on values for a and b do not show that a^b is positive.
And I believe the concluding statement for (1) is insufficient, not 'sufficient' as currentlyindicated.
There were two typos:
1. Instead of b^a it should have been a^b in the explanation of (1).
2. Instead of "Now sufficient" it should have been "Not sufficient".
Edited.
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Statistics : Posted by Bunuel • on 16 Sep 2014, 01:18 • Replies 12 • Views 22673
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