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Dr.Math ....hes a doctor...of MATH
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26 / M / Montreal, Canada
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Posted 4/13/11


That answers your question.
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21 / M
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Posted 4/13/11
It's both 288 and 2 >.<
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26 / M / Secret Base
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Posted 4/13/11


You should be able to solve this.
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24 / M
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Posted 4/13/11
I could blue, if I could read it.
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22 / M
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Posted 4/13/11
if integral f(x) dx from 1 to 4 is 6 then what is the value of integral f(5-x)dx from 1 to 4
Tegrom 
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30 / M / UK
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Posted 4/13/11
The problem is stated ambiguously.

The answer is either 288 or 2.

Were it stated explicitly as either (48/2)*(9+3) or 48/(2*(9+3)) it becomes immediately clear which answer is correct.

The lack of an explicit statement of the multiplication implies that it is grouped with the evaluation of the term in brackets, however without further clarification it is impossible to reduce the problem to a single solution.
Posted 4/13/11
You sir, get a star badge. Weldone.
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30 / M / Germany
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Posted 4/13/11 , edited 4/13/11
I thought a/2 is the same as a * 0.5, but I dont know if it is really defined that way, and I don´t care enough to look it up. In a more general case it should always be the multiplcation with the inverse element, therefore I am a bit sure of it.

@blue_banana
Your english version does not coincide with the japanese one? The japanese one should be solvable with Fermats little theorem I guess.
Posted 4/13/11
This was taken from Dr.Math himself....hes a doctor...of MATH.

http://mathforum.org/library/drmath/view/54341.html

This paragraph makes it very clear.

"I don't know of a general rule among mathematicians that implied
multiplication should be done before explicit multiplication. As far
as I'm concerned, all multiplications fit in the same place in the
order of operations. It's not an unreasonable rule, though, since it
does seem that implied multiplication ties the operands together more
tightly, at least visually; but the idea of Order of Operations (or
precedence, as it is called in the computer world) is supposed to be
to ensure that everyone will interpret an otherwise ambiguous
expression the same way - so if some texts change the rules, or if
people do what feels natural, the purpose has been lost."
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26 / M / Montreal, Canada
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Posted 4/13/11
You basically have to do the paranthesis first, clearing them out gives you the 2(12) then after you do the multiplication to get rid of it which gives you your 24, then we get to the division which makes it 48/24=2
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26 / M / Secret Base
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Posted 4/13/11

aaaaaaaargh wrote:

I thought a/2 is the same as a * 0.5, but I dont know if it is really defined that way, and I don´t care enough to look it up. In a more general case it should always be the multiplcation with the inverse element, therefore I am a bit sure of it.

@blue_banana
Your english version does not coincide with the japanese one? The japanese one should be solvable with Fermats little theorem I guess.


Well done good sir, have another!



and in English...

Any integer divided by 14 will have a remainder between 0 and 13. Given a is has remainder of 6 and b has remainder of 1 when divided by 14, what is the remainder of x when divided by 14, given x is an integer solution to x^2-2ax+b=0?
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27 / M / Raccoon City
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Posted 4/13/11

burningace wrote:

if integral f(x) dx from 1 to 4 is 6 then what is the value of integral f(5-x)dx from 1 to 4



Answer:
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23 / F / SA
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Posted 4/13/11
Calm thee shit down people! I take this, thee answer is . . WHO CARES?
Posted 4/13/11
I prefer the answer 288 (refer to the large paragraph from my last post), though the answer is actually undefined.

http://artoftrolling.files.wordpress.com/2011/04/chatroulette-trolling-or.jpg
Artfan 
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36 / M / Am
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Posted 4/13/11

michaelbritton wrote:

I prefer the answer 288 (refer to the large paragraph from my last post), though the answer is actually undefined.

http://artoftrolling.files.wordpress.com/2011/04/chatroulette-trolling-or.jpg


Yep, order of operations, implied or not. Add in parentheses, then divide, and then multiply.
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