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You are not logged in. #1 20120425 07:04:08
Calculus  Area of a curveHi all. I am onto Calculus now. Thing is, I have only done 2 lessons and never studied it before. I'm getting on alright, but I have a really hard question (well, hard to me). It's an extra question, so if I don't do it it isn't a big deal, but I am trying to figure it out. Don't think outside the box. Think there is no box #2 20120425 07:07:17
Re: Calculus  Area of a curveHi amberzak; Can you solve that or do you need help? In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #4 20120425 07:40:17
Re: Calculus  Area of a curveHi; Subtract 2 from both sides and turn it around. Multiply everything by 1 Can you factor that? In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #6 20120425 07:58:01
Re: Calculus  Area of a curveCorrect! Very good! In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #7 20120425 08:12:00
Re: Calculus  Area of a curveOkay, so next part of the question. (I can't do the notation on here so I'm just going to write it without the correct notation). Don't think outside the box. Think there is no box #8 20120425 08:22:01
Re: Calculus  Area of a curvehi amberzak, You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #11 20120425 08:42:06
Re: Calculus  Area of a curveHi amberzak The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment #12 20120425 08:53:37
Re: Calculus  Area of a curvehi amberzak, you will get the area below the curve down to the x axis. That's what area type integration does. (Why is a much longer post for another day I think!) So the integration gives an answer that is too big. Take off 8 for the green rectangle and you should get the right result. So let's check the integration Bob You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #13 20120425 08:56:46
Re: Calculus  Area of a curveHi Bob The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment #15 20120425 09:00:10
Re: Calculus  Area of a curveWell,you did say to take off 8. The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment #16 20120425 09:03:39
Re: Calculus  Area of a curveSorry for double posting. The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment #18 20120425 09:04:42
Re: Calculus  Area of a curveLook at the post right above your new one. The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment #20 20120425 09:14:18
Re: Calculus  Area of a curve
I see it now. I've spent all day driving and gardening (big tree to cut down) so my brain is not at its best. Here is a correction to post #12. = 18 and 2/3 less 8 = 10 and 2/3 My apologies for the error before. I need some sleep. Bob You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #21 20120425 09:14:27
Re: Calculus  Area of a curveNo,he didn't integrate the term 2x correctly. The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment #23 20120425 09:19:46
Re: Calculus  Area of a curveI saw it. I still do not get why the two small parts next to the rectangle don't mess it up. The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment 