i got this math question for homework but im having trouble, my teacher said i could use the internet so ill ask here. if 5! = 5times4times3times2times1 and 3! = 3times2times1 what is 7! - 4! much help would be thanked
so you mean 7! divided by 4! ? 7! is 5040 and 4! is 24 so the answer is 210 seriously though? do you have windows? it has a calculator
The ! in mathematics means factorial If you have 7! then multiply 7*6*5*4*3*2*1 If you have 10! then you multiply 10*9*8*7*6*5*4*3*2*1 If you are dividing factoials, first cancel common factors and then multiply what remains example 6!/4! (6*5*4*3*2*1)/(4*3*2*1) we first cancel all common factors and then multiply what remains. We cancel (4*3*2*1) and multiply 6*5=30. I don't have access to an equation editor on this site, so this is the best I can make it look.
ah, math....i hate it calculus is no easier, dude... XD wasn't too long ago that i created a thread to help me come up with research paper ideas, and i believe it spread into more homework for other people...there's been a few homework threads, actually, i think. maybe an official one would be a good idea? happy you got it figured out, dude845.
I usually find that people that do not like math had a bad experience with educators. Many teachers try to teach important concepts and fail. Conceptual understanding is not yet taught in schools, instead performance goals are emphasised (teach just enough to pass the next test). With this type of teaching, important concepts are not stressed and therefore not retained by students. Especially in math, content mastery is a must before allowing a student to move on. Confusion, especially in math, will NOT go away, it will only compound itself. Sorry did not mean to bore everyone. Won't do it again! Calculus is not difficult, it just wasn't explained properly to you
well, you're right. my only problem with math has really been that i can't remember everything. while working with formulas and theorems, i have an understanding; however, no matter how much i drill or practice, i forget everything after a short time and find myself SOL. guess i'm running with a limited mental hard drive capacity and a program that erases all files that don't get used for a day. arg.
wrf01a: calc isn't that difficult; i simply have a hard time keeping up with the pace my AP teacher sets, as well as his demands of hard memorization and the ability to recall many things immediately.
Learning has a lot more to do with knowing how to use information, not how much you can memorize. I expect students to know the basics. If they need the Quadratic Equation on a test it will be provided. But they do need to know how to use it. Short cuts for derivatives are great, but knowing to use the definition to obtain a derivative is much better. Students don't fail, teachers fail. The system fails.
that's why i love my physics class so much more than calc. in calc, i have to know all the formulas, all the equations, everything. in physics, i have them all laid out on a sheet. given to me like that, i can use them like crazy. that i can do well, and get the right answer every time.
by having a "cheat sheet" type thing of equations, or by having to memorize everything and fail when they forget? lol, i'm confuzzled, ddp
Heres is how it should be done. (my method) One index card with notes to be used on the test. Students put whatever notes they feel are important on one index card. All index cards are submitted the day before the test. 1.Students have to reveiw and decide what is important enough to put on the notes. (they study and most don't realize it, cool huh) 2. Because notes are submitted a day before a test, that usually translates into 2 days of study. (playing dirty now.) 3. While making notes, students come up with good reveiw questions. 4. At this point the teacher reviews the notes to determine what students feel is important and to detect errors in student thinking. (if a major error is detected by a majority of students then that area will be covered in detail again prior to the test.) Sometimes students just don't ask questions because they think they are the only ones who don't get it. 5. FINALLY, students should become aware that tests do not always require memorizing facts but instead emphasize application.
and that is a GREAT method. same thing in my physics class. i'm doing quite well in there. in calc, though...*shudders*. want to come teach at Hillsboro High School? you could probably beat the crap out of my current teacher? lmao.
Wish I could, but I have enough troubles here. Kids are hard work. But ya'll keep me young And lots of gray hair. Learning calculus you need to know a few important points. And if you don't know them ask questions. 1. You must understand the notion of a limit, this is so important because the definition of a derivative is the "limit of f(x+h)-f(x) divided by h as h approaches 0" Until this is understood the study of calculus CANNOT continue. This basic concept MUST be understood. 2. Calculus is the study of change. (and much more) You need to know what a derivative is. Not just the short cuts of how to get a derivative of some function. Explain in real words, what is a derivative. It does no good to study something and have no idea what it is. If you don't know what it is ask you teacher. YOU NEED TO KNOW. Again students dont fail, teachers do.
