taylor192 | 04-12-2011 01:47 PM | Quote:
Originally Posted by Presto
(Post 7387026)
Sorry, how is the equation ambiguous? I really don't see how this can be. Is BEDMAS invalidated now that people are plugging numbers into the calculator? What rule are people using to come to the answer 2? | I wish we could fail mods, especially ones on a power trip. Thankfully, there's at least one member on here that gets it: Quote:
Originally Posted by T.T it's ambiguous because when someone asks you to interpret 1/2x you don't know whether they mean (1/2)x or 1/(2x). 9 times out of 10 they mean 1/(2x) because the 2 and the x are implied to be together (kinda like the 2(9+3) here) and they are either lazy (bastards!) or don't know how to use brackets to avoid confusion.
I'm not saying interpreting it as 1/(2x) is 'correct'. The first thing I would do is get them to clarify if they mean
(1/2)x or
1/(2x)
that's the proper way to type out the equation to avoid confusion. | Its funny, even with this, some people don't get it: Quote:
Originally Posted by Presto I can understand the need for clarification once you start having to solve for 'x', but you kinda lost me on the ambiguity of this thread's particular equation. Though poorly written, it's written in a way that is solvable with conventional means. There's not really any other way to approach it differently, if a person knows the rules. | I'll try and break it down into more simple terms for you:
Do you know what a unary operation is? Its an operation with only 1 operand. ie: -3
So what's the outcome of this?
-3^2
it could be:
-(3^2) = -9
(-3)^2 = 9
Cause BEDMAS does not apply to unary operators.
Notice how this equation is missing an operand between the "2" and the "(". We can assume this is an unary operand, in which case it could be expanded to either:
48 / [2 * (9+3)] = 2
48 / (2) * (9+3) = 288
Usually unary operands get evaluated first, anyone who develops software knows this cause "++" is a unary operand. Thus why some calculators are returning the answer as 2.
There's your math lesson for the day. |