You will see formatted as in a textbook if the MathJax UserScript is installed and working. Type this as an example (replace the [- with [ when typing): being a jerk (Jerks get banned.) Using LaTeX.image or video link-posts (Links to articles, Desmos, Wolfram|Alpha, and the like are fine.).one-sentence posts (Have some respect for people who take time to answer your question and follow the posting rules.).posting of quizzes or lists of questions.offers or solicitations of payment in any form.personal information (Check your documents before posting.).r/LearnMath Chatroom Join the unofficial IRC channel: #LearnMath on Freenode (no client required). Reddit Enhancement Suite allows Imgur URLs to be expanded inline but doesn't work so well for other image-hosts.ĬhatGPT and other large language models are not designed for calculation and will frequently be /r/confidentlyincorrect in answering questions about mathematics even if you subscribe to ChatGPT Plus and use its Wolfram|Alpha plugin, it's much better to go to Wolfram|Alpha directly.Įven for more conceptual questions that don't require calculation, LLMs can lead you astray they can also give you good ideas to investigate further, but you should never trust what an LLM tells you.We recommend using Imgur to upload images for linking inside posts.Include any equations or assumptions you are using, and descriptions of any attempts you have made.Where are you in the process? Provide those who help with as much information as possible. What does your instructor (or the text) want you to accomplish? To receive the best help, please use the following format: Sample topic questionĮX: Quadratic Equations EX: Probability Be civil and polite this is meant to be an approachable community for discussion of reason and logic. Questions, no matter how basic, will be answered (to the best ability of the online subscribers).įollow reddiquette. Post all your math-learning resources here. This is a subreddit for learning math, and can be seen as a sister subreddit to /r/math. Think /r/math is too advanced? Here, the only stupid question is the one you don't ask. We're no longer participating in the protest against excessive API fees, but many other subreddits are check out the progress among subreddits that pledged to go dark on 12 July 2023 and the top 255 subreddits (even those that never joined the protest). | Each post must include a specific title and description. But for the sake of this problem, we see that A is equal to four and B is equal to negative 1/5.Set your post to "Resolved" when answered. And so we could say g of n is equal to g of n minus one, so the term right before that minus 1/5 if n is greater than one. Would use the second case, so then it would be g of four minus one, it would be g of three minus 1/5. To find the fourth term, if n is equal to four, I'm not gonna use this first case 'cause this has to be for n equals one, so if n equals four, I Trying to find the nth term, it's gonna be the n minus oneth term plus negative 1/5, so B is negative 1/5. So if you look at this way, you could see that if I'm You see that right over there and of course I could have written this like g of four is equal to g of four minus one minus 1/5. And so one way to think about it, if we were to go the other way, we could say, for example, that g of four is equal to g of three minus 1/5, minus 1/5. The same amount to every time, and I am, I'm subtracting 1/5, and so I am subtracting 1/5. Term to the second term, what have I done? Looks like I have subtracted 1/5, so minus 1/5, and then it's an arithmetic sequence so I should subtract or add Let's just think about what's happening with this arithmetic sequence. This means the n minus oneth term, plus B, will give you the nth term. It's saying it's going to beĮqual to the previous term, g of n minus one. And now let's think about the second line. So we could write this as g of n is equal to four if n is equal to one. If n is equal to one, if n is equal to one, the first term when n equals one is four. Well, the first one to figure out, A is actually pretty straightforward. And so I encourage you to pause this video and see if you could figure out what A and B are going to be. So they say the nth term is going to be equal to A if n is equal to one and it's going to beĮqual to g of n minus one plus B if n is greater than one. Missing parameters A and B in the following recursiveĭefinition of the sequence. So let's say the first term is four, second term is 3 4/5, third term is 3 3/5, fourth term is 3 2/5. g is a function that describes an arithmetic sequence.
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