math question?

<p>For what value of x is the statement x # y = x</p>

<p>(A) -2
(B) -1
(C) 0
(D) 1
(E) 2</p>

<p>the right answer is -1 </p>

<p>can someone explain? thanks!</p>

<p>What does the operation # imply?</p>

<p>weird does that mean what value of x is teh statement ‘x not equal to y’ equal to x? that doesnt make sense, # has to be an operation of some sort and there should be other stuff in the questions; otherwise the answer is 0 (C).</p>

<p>the answers 0 (C) if the # sign means multiply…</p>

<p>edit: or divide.</p>

<p>Maybe the # was “Shift-3”, implying x^3*y=x, or something like that…</p>

<p>maybe it was a convolution integral, so # = *</p>

<p>probably not though since there’s no identity for it</p>

<p>yea doesnt sound like a CB question unless there is more to it…</p>