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Let .  For what value of x does  for all values of y?

   Let .  For what value of x does  for all values of y?
(A) 0
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Nova Press: Set D - Defined functions

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Replies to This Thread: 1 | ----
Let .  For what value of x does  for all values of y? 
Posted: 02/26/2014 17:31
If x not=0, then y could be any number >=0. If x=0, y must be 4. Why zero? Could u explain it, thx.
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Posted: 02/28/2014 10:48
Michael, read the question again carefully. It is asking for what value of x, not what value of y (which is what your thinking is).
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