Then posting $1.50 as a possible solution (given the disproofs that you have read) without providing any rationale as to why it should be that value wasn't a particularly good reply.
All the numbers that satisfy y=1+x/2 are valid. With x=1 you get y=1.5. In addition to this, 1$ and 2$ are also solutions, so it is "black" and "Thursday", courtesy of the ambiguity of the problem statement.
You seem to have missed (or ignored) the discussion on the terminology. The problem: What is the Cost of a book that costs 1$ plus half of its price? If you insist that "cost" = x and "price" = y (or vice versa) then you end up with X = X + Y/2. Which is self contradictory. X, by definition, is X. Therefore it's $1. It is either $2 or $1 (as shown by me in an earlier post and here).
The OP has said:for the ones that are struggling. Its definitely not 1.5. So your continued claim that the answer is $1.5 is the one answer that the OP has told you is wrong. Arthur
Err, no, you end up with y=1+x/2 What does all of the above have to do with the problem being ill-posed to start with? It is ANYTHING, including "Feb the 30-th".
Er ,no you don't since the OP explicitly stated Therefore if you use X as "cost" you end up with what I wrote: X = X + Y/2 and X is already defined as $1. But nice try anyway. No, Feb 30[sup]th[/sup] is Z.
Lets try this once more: The price (cost) is $1 plus half (.50) of the initial price (cost). Obviously you would never see such clumsy wording but it can only be $1.50.
...which is pure nonsense since it results into y=0 Irrelevant, since it produces y=0. You should pay more attention to your tries. So what is your difficulty in understanding ill-posed problem statements? Earlier on in the thread you appeared to have understood that the problem was ill-posed.
Again you fail. http://www.sciforums.com/showpost.php?p=2699913&postcount=19 Now read it and note the revised wording. Oh wait, you claimed you already have read it.
Didn't I already say that it's nonsense? Let me check... Yeah, close enough. Correct. So that you can understand them? Correct. And gave the answer ($2). Plus the frivolous one ($1).
Congratulations, you got two of the infinity of possible answers. Persevere and you'll get the others.
I am answering the initial post, as it was presented. "What is the Cost of a book that costs 1$ plus half of its price?" He said the cost (price) is (was) $1.00.
Read. The word COST is used twice. Therefore it's either $1 (and the problem as stated is self-contradictory) because if the book costs $1 that automatically answers "What is the cost of the book?" or $2 as shown. Get it?
I am just looking at it from the standpoint of trying to figure out what a person would mean by the statement (OP) but if taken literally then it should not be asked that way or even attempted to be answered. He said it cost $1 plus half. The question is, half of what? He did say the cost is $1 but we really dont know for sure. Taking a guess we would assume it to be the $1.00 mentioned.
You can't cast into an algebraic form a problem that lacks logic consistency. Perhaps one day you'll figure out the notion of ill-posed problem. The day hasn't come yet for you but you should persevere, you might get it. And then, you might not.
You'd think he'd let this embarrassing thread die, but he apparently wants to build another monument to yet another blunder. Arthur
You can't cast into an algebraic form a problem that lacks logic consistency. Perhaps one day you'll figure out the notion of ill-posed problem. The day hasn't come yet for you but you should persevere, you might get it. And then, you might not. In your case, you WILL not. Too much blinders.
He'll probably grow out of this kind of youthful exuberance in a few years. Right now, I'm guessing he's probably about 20, with all the overconfidence and ego that goes with zero life experience.
