I agree! Not just in maths but in any subject that uses the calculator. I get that students might overuse which is the classic excuse but they have to show their working so it shouldn't really matter in my opinion
The 6 things listed in the video: 1. Calculating solutions of x --- using the 'Solve =' function 2. Converting between different units -- using the 'CONV' option 3. Finding/Checking an equation of a line "y = bx + c" --- using the 'Regression Calculation' function, listed under 'Statistics' 4. Factorising polynomials 5. Generating values for a function, to find the first "n" terms of a sequence -- using the 'Table' option, under 'Menu' 6. Generating values for a function, to obtain an idea of the nature of its graph -- also using the 'Table' option
Thank you very much, Jack! I'm an independent candidate whose been trying to complete the A level in 100 days in time for these exams and your videos have been a huge help. Other than past papers what would you say the best way to revise was as there aren't many past papers for the current spec. (I'm doing the Edexcel course).
The CGP textbook is good. Do all the boards papers, not just Edexcel. Use physics and maths tutor .com for old spec papers. There's madasmaths and naikermaths and crashmaths websites as well.
@@TLMaths Hi TL, another question for you. On the Edexcel course I know there are two mixed pure papers, I know they mix C1 and C2 but is there anything that distinguishes them at all? Is one paper more skewed towards certain parts of maths or are they basically exactly the same?
This is a really good video. If I could offer a tip, it would be that for conversions it is easiest to start with the number you want to convert and then press the conversion key
Great video Jack. Thanks. I would personally say that it is worth getting a more powerful calculator for A-Levels. It is a bit more to get used to but the extra features can be a great help in exams (for example, checking all the solutions to a complex trigonometric equation using the graphing app). For GCSE, the trade off in learning to use a graphic calculator is probably not worth it (some common functions become secondary shift operations etc.)
Does exist a not graphing calculator that besides calculating derivatives and integrals in a specific point gives me an equation as a result ? P.S: sorry for my ignorance... very few people on the net are so clear and professional in explaining , thank you so much Prof !
I have already done exams like mathematical analysis, geometry and others. I need to optimize the times in other types of tests like control systems where mathematical calculations are not examined I asked for non-graphic calculators because output like nyquist or bode graphs are not allowed, but there's no problem for a not graphing calculator that gives me mathematical expression of derivatives and integrals. The problem is...does exist a calculator like that? 😅 Thanks you so much anyway !
It uses the Newton's method. It needs a starting value, then it replaces the function with its tangent in at the starting value and calculates the root of the tangent. This then becomes the new starting value and it continues until it finds the root. Newton's method is really fast when it works but sometimes it can fail. In the first example if you start at 2 the values are 1,844886976 1,815220847 1,814305169 1,81430433 and that's it. You can do Newton's method even without the solve function but you need to get the derivative. The principle is new x = x - f(x)/f'(x). If you want to do it by "hand", first enter the starting value like "2 =" then enter the x-f(x)/f'(x) using Ans in place of x and then hit = until the value does not change. For example: ans - (8* exp(2*ans-3)-15) / (8*exp(2*ans-3)*2) (The 2 is because of the chain rule). An obvious failure of the Newton's method is if f'(x)=0. This causes a division by zero. Strangely the calculator does not fail on this though it does take somewhat longer. It does something strange, possibly adds some small value to the starting value.
I have a problem with the first example the solve button, I have the same calculator and did exactly the same, when i type 8e^2x-3=15, and then click shift and the CALC (SOLVE) button it doesnt do anything, nothing changes, then i click the CALC without shift and the X=0 comes up, i put X=2 and click equals and I get an error message, is this a problem with the calculator or am I doing something wrong? thank you
When you've typed in your equation and you press SHIFT and then SOLVE, it should come up with x = something. It is asking you to input a value of x to start looking for a solution. Type in a value of x , press equals, and it should home in on the closest solution.
@@TLMaths well you see luckily, my college was selling it cheaper this year because of covid. It only set 10 pounds more than this one so i guess i was kinda lucky in that sense.
The Casio 991es doesn't have all the capabilities of the 991ex. I don't have one to hand, but you will need to get the 991ex at least to study A-Level Maths as the 991es doesn't have all the required features for the course.
Hi. All year I’ve been using the graphical calculator Casio fx-9860II mainly because I lost my original Casio calculator. Throughout the entire year I’ve used this graphical calculator but I was wondering, should I still buy the original Casio calculator for the exam?
@@TLMaths It can be very useful if for example I have a Taylor polynomial to develop and I have (1/2x^1/3 - x^3)^4. In this case it very easy to make mistakes. But if the calculator can do this, it will be more simple with less mistakes
The calculator can't expand brackets for you. The best it can do is nCr to find the position in Pascal's triangle. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-IhRh2SJ2vjo.html
A calculator will only not be allowed if it does any sort of algebraic manipulation. The CG50 uses all it's functions numerically I believe. I'd make sure you set the calculator into examination mode though, this just blocks any kind of storage access so if invigilators ask to check the calculator, you're not risking anything.
I personally think its very important to learn how to sketch graphs - it links a whole host of ideas together and allows you to visualise what's going on. A graphical calculator can take that opportunity away. I don't ask my students to buy graphical calculators - I only really recommend to those who are really not confident
How do you know the answers your calculator gives are correct? We have en.wikipedia.org/wiki/Pentium_FDIV_bug. How do I make this calculator recognize IEEE 754 (including Infinity, NaN, and denormal numbers)? I expected bitwise operators like left shift and right shift. Where are those operators in this calculator? Even other calculators without integers like JavaScript and LuaJIT have left shift, right shift, bitwise and, bitwise or, bitwise xor, and bitwise not. How do I treat these value as 32-bit signed integers in this calculator?
im guessing the cs in your name stands for computer science lol just get the fancy graphing calculator you can do python programmign on it and if ur worried about floating point arithmetic then just calculate everything in your head