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W-K 666 Send message Joined: 18 May 99 Posts: 19093 Credit: 40,757,560 RAC: 67 |
Calculators and spreadsheets don't always get it right. Try a^b^c in excel and it does (a^b)^c instead of the normal recognised way of a^(b^c). |
janneseti Send message Joined: 14 Oct 09 Posts: 14106 Credit: 655,366 RAC: 0 |
a^b^c in Excel example 4^3^2 = 4096. However. (4^3)^2 = 4096 4^(3^2) = 262144 a^b^c is an example where parenthesis are nescessary not only in Excel but in general math as well. Exponents go before Mult and Div. Again. Parenthesis gives instructions to the parser how to handle precedences. |
W-K 666 Send message Joined: 18 May 99 Posts: 19093 Credit: 40,757,560 RAC: 67 |
a^b^c in Excel example Parenthesis is not needed in general maths, you start at the top, therefore b^c is done first. |
janneseti Send message Joined: 14 Oct 09 Posts: 14106 Credit: 655,366 RAC: 0 |
True. But you have to be used to do these arithmetic exercises. a^b^c is quite rare in math. The only thing I can think about is Googolplex, 10^(10^100) |
Sarge Send message Joined: 25 Aug 99 Posts: 12273 Credit: 8,569,109 RAC: 79 |
a^b^c in Excel example Really? F = R([(1 + i)^n - 1] / i), where i = r / m and n = m * t. These may not be using letters your familiar with, but does this look like a formula you've seen that gets frequent use? Capitalize on this good fortune, one word can bring you round ... changes. |
bobby Send message Joined: 22 Mar 02 Posts: 2866 Credit: 17,789,109 RAC: 3 |
NO. The precedence has not been specified. Computer Geeks know that there is more than one system of precedence and know that the system must be specified or the problem can't be parsed.if the precedence of operators is in question, then wouldn't it be: For the record, I was not making the case that the precedence of operators was in question, only that if Gary was (as he seemed to be), then wouldn't the form I used be more logical. Perhaps Gary's version was more along the lines of: ((10 + 10) * 0) + 10 = 10 which ignores the precedence of operators and instead employs precedence by sequence. If sequence can result in confusion then rewriting the expression as: 10 * 0 + 10 + 10 avoids it. I think you'll find it's a bit more complicated than that ... |
W-K 666 Send message Joined: 18 May 99 Posts: 19093 Credit: 40,757,560 RAC: 67 |
Was education a waste for many people? A fifth of adults have forgotten how to do fractions or percentages |
janneseti Send message Joined: 14 Oct 09 Posts: 14106 Credit: 655,366 RAC: 0 |
Was education a waste for many people? I would say there are now too many teachers who have forgotten how to do fractions or percentages. Or at very least know how to explain it. If not teachers can do it, how do you suspect pupils can do it? And how many of us can see the difference between average and median? In politics and decisions to vote these things matters. |
janneseti Send message Joined: 14 Oct 09 Posts: 14106 Credit: 655,366 RAC: 0 |
No calculators, nor computers, when I went to school. I used my fingers as tools to calculate things. Still do. However nowadays this is not the appropiate way do to it. One of my nephews was told to stop that "habit" in highschool because according to the teacher there are now other "methods". Silly thing. Why we use a decimal based math is because we have ten fingers. Digit even means finger in latin! |
janneseti Send message Joined: 14 Oct 09 Posts: 14106 Credit: 655,366 RAC: 0 |
Hehehe. That's not even math. It's counting. Normally the cashier starts with the amount you should pay and adding up with money until it reaches to what you gave. |
bobby Send message Joined: 22 Mar 02 Posts: 2866 Credit: 17,789,109 RAC: 3 |
Quick story... Was the sex and age of the cashier relevant to the anecdote (remembering "the plural of anecdote is not data")? If so, how? Otherwise isn't this an example of sexist and ageist bigotry? I think you'll find it's a bit more complicated than that ... |
janneseti Send message Joined: 14 Oct 09 Posts: 14106 Credit: 655,366 RAC: 0 |
Quick story... For heavens sake. Most of the cashiers are female and young. But there are also male cashiers, often old ones, that behave in the same stupid way. Met several. |
Gary Charpentier Send message Joined: 25 Dec 00 Posts: 30690 Credit: 53,134,872 RAC: 32 |
Was the sex and age of the cashier relevant to the anecdote (remembering "the plural of anecdote is not data")? If so, how? Otherwise isn't this an example of sexist and ageist bigotry?Give him he double hockey sticks with a high sticking penalty. |
janneseti Send message Joined: 14 Oct 09 Posts: 14106 Credit: 655,366 RAC: 0 |
Was the sex and age of the cashier relevant to the anecdote (remembering "the plural of anecdote is not data")? If so, how? Otherwise isn't this an example of sexist and ageist bigotry?Give him he double hockey sticks with a high sticking penalty. Him? Swedish Hockey Team. |
Gary Charpentier Send message Joined: 25 Dec 00 Posts: 30690 Credit: 53,134,872 RAC: 32 |
Him?Clyde Swedish Hockey Team.That's not the Clarkson Cup. |
Bernie Vine Send message Joined: 26 May 99 Posts: 9954 Credit: 103,452,613 RAC: 328 |
Please can we stop the name calling. And no, I do not think rating anyone's posts is a good idea. |
Gary Charpentier Send message Joined: 25 Dec 00 Posts: 30690 Credit: 53,134,872 RAC: 32 |
And no, I do not think rating anyone's posts is a good idea.DA does, it is built into the BOINC forum software. Wiser persons disabled it for this forum, but you can find it on some other projects. |
Sirius B Send message Joined: 26 Dec 00 Posts: 24881 Credit: 3,081,182 RAC: 7 |
1st there was the 11+, now it's the 4+. Baseline tests dropped As such, there will be optional baseline tests if schools want to take them next year, but the results will not be used for "accountability purposes". Yeah, right! |
W-K 666 Send message Joined: 18 May 99 Posts: 19093 Credit: 40,757,560 RAC: 67 |
The UK government announced a few days ago that they wanted all schools to become academies. http://www.bbc.co.uk/news/education-35814215 This makes the schools independent financially and not controlled by the local government. But today it has become known that Halewood Academy in Knowsley, Merseyside, {Liverpool, to all intents and purposes), the only school in Knowsley that teaches 'A' levels, is to close the 'A' level classes. http://www.bbc.co.uk/news/education-36046503 |
Darth Beaver Send message Joined: 20 Aug 99 Posts: 6728 Credit: 21,443,075 RAC: 3 |
Well you did vote the Tories in so you can't now whinge when your Uni students have 50,000 pound degrees and are saddled with loans they can't pay back or your kids are being taught religion the poor can't afford to go to school because there all private schools . Oh well only 4 more years till you will be able to fix the problems it will cause . As a resent American congress report say's the student loans are causing a lot of problems in America You will end up with the American system good luck with that one . |
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