Thread: "I Love College"
11/08/2012 10:56pm, #241
11/08/2012 10:57pm, #242
Is this algebra or is it just arithmetic?
11/08/2012 10:58pm, #243
But there is more to it than that...generational differences in calculators, for one. This is truly a math geek's sort of thing, so it makes me sick to my stomach and I need walk away and chew on some beef jerky.
Date: 05/02/2008 at 13:20:22
From: Doctor Peterson
Subject: Re: Multiplying parenthetical phrases and order of operations
Your two expressions in the calculator are
36 / 6 ( 25 - 11 * 2 )
36 / 6 * ( 25 - 11 * 2 )
The problem is that some calculators that allow multiplications to be implied as in the former case treat that as a higher precedence operation (as some algebra texts say), while others treat all multiplications alike (as most texts do, in my experience). You can read a little about that here:
Order of Operations
That has a bad link to TI's site; a current version can be found by going to their Knowledge Base and searching for "implied
multiplication". Here is a quote:
Solution 11773: Implied Multiplication Versus Explicit
Multiplication on TI Graphing Calculators.
Does implied multiplication and explicit multiplication have the
same precedence on TI graphing calculators?
Implied multiplication has a higher priority than explicit
multiplication to allow users to enter expressions, in the same
manner as they would be written. For example, the TI-80, TI-81,
TI-82, and TI-85 evaluate 1/2X as 1/(2*X), while other products
may evaluate the same expression as 1/2*X from left to right.
Without this feature, it would be necessary to group 2X in
parentheses, something that is typically not done when writing
the expression on paper.
This order of precedence was changed for the TI-83 family, TI-84 Plus family, TI-89 family, TI-92 Plus, Voyage™ 200 and the
TI-Nspire™ Handheld in TI-84 Plus Mode. Implied and explicit
multiplication are given the same priority.
If you have any further questions, feel free to write back.
- Doctor Peterson, The Math Forum
Last edited by W. Rabbit; 11/08/2012 11:03pm at .
11/09/2012 1:20am, #244
Damn, giving imlicit multiplication a higher priority just for the sake of (dubious) convenience is retarded. No wonder kids were screwed up in the 90s.
****, I'm almost screaming this out loud.
Last edited by Tranquil Suit; 11/09/2012 1:32am at .
11/09/2012 1:44am, #245
11/09/2012 1:54am, #246
Yes and still I'm going :Rage2:
Damn. Out of all the things on Bullshido, this is what gets me.
11/09/2012 1:55am, #247
11/09/2012 2:08am, #248
I am actually kicking myself pretty hard for fucking this up. I have gone all the way through calc3. I do math on a fairly regular basis as a professional need.
I am actually rather embarrassed in fact it sort of kind of depressed me quite a bit earlier.
No matter how much I want the answer to be 1 so that I will be right there is nothing I can do about it because
the answer is
I also get the frustration your having, people fucking up hard factual things is scream worthy as there is no grey area.
11/09/2012 2:09am, #249
The "answer" depends on what you're trying to use the notation to solve. And yes, adding explicit parenthesis clears it all up for the computer as Rivington pointed out.
Last edited by W. Rabbit; 11/09/2012 2:16am at .
11/09/2012 2:22am, #250
I should be more careful as to be taken more seriously but what eves