No, the Casio fx-991ES PLUS is not a programmable calculator. The calculator can, but it is not programmable. This means the calculator is suitable for many exams, such as A-levels.
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The FX-991ES Plus scientific calculator with 580 functions and new distribution functions is the most technically advanced model in the FX-ES Plus series making solving equations easy. Fx-82AU PLUS II; fx-82AU PLUS II Emulator Software; fc-100V; fx-100AU PLUS; fx991ES PLUS; fx-CG50AU; Where To Buy; PROFESSIONAL DEVELOPMENT. Whangarei; Auckland; Hamilton; Napier; Wellington; Christchurch; Dunedin; Request Professional Development. Fx-991ES Downloads. Official documents: fx-991es User's Guide. Chaos daemons free ui missing.
Welcome to blog entry #73. Just an announcement:Starting Monday on April 23, 2012, I begin my Calculus Revisited Series, where we revisit some of the major topics of calculus. Each blog entry is going to contain a quick summary of the topic, followed by a few example problems. Hopefully this serves as a review for students in calculus in time for finals or perhaps you want to revisit some of the topics. It will be one blog each day, Monday through Thursday except on Friday, where you get three for the price of one. (don't worry, it's free).Onto today's topic.
The Casio fx-115ES Plus Calculator Review! The fx-115ES PLUS is the successor to the 2006(?) when was this calculator first released? fx-115 ES. Outside of the United States, these calculators are called fx-991ES PLUS and fx-991 ES, respectively.I purchased the fx-115ES PLUS at a WalMart in Glendora, CA. Apparently, this is the only major store at this time that carries the new fx-115ES PLUS outside of ordering online. It cost me $17.48, around the same price the classic fx-115 ES cost.The picture below is a comparison between both models.
The new fx-115 is on the left. FeaturesThe fx-115ES PLUS retains the Natural-V.P.A.M. (Visually Perfect Algebraic Method), which means that you can enter equations and expressions exactly as written. The MathIO method allows the user to accomplish just that. Fractions, radicals, expressions with π, and calculus function templates are all there.
Exact answers can include fractions, square roots, and coefficients of π (MathIO).For those who want a older style, one-line entry method, the LineIO method has been retained. Personally, I prefer the MathIO method.All of the other features that were present in the classic fx-115 ES are here to:. Integrals of f(x). Numeric Derivatives: d/dx.
Sums of a function: ∑ f(x). Base modes Decimal, Octal, Binary, Hexadecimal. Numeric solver, of equations and roots of expressions.
Yes, the variable to solve for is X. Hi there, thank you for this review. I've got a few questions about this one (fx 115 ES plus) and (fx 991 ES plus) as you mentioned they are for different regions only.But if you look closely, you can see the difference between those two.
The biggest problem is that in CASIO website (USA) there isn't any information about fx 115 ES plus, there is only photo and written: 'Coming Soon!' .And what concerns me the most is whether fx 115 es plus is better than fx 991es plus?
You can check in casio website (or even yours) that you have more functions (in ALPHA mode, written in red color) than fx 991 es plus.And on the fx 115 es plus photo (in CASIO USA page) you can see inequality on the main screen. Does that mean that fx 115 has inequality solving capability? And in other websites (or even CASIO website) I can't find a proof that fx 991 es plus has inequality solving capability. Thank you in advance.
Justin,Thanks for the questions.:)Yes, you are 100% correct about the 'Coming Soon!' I can't find the manual online either. No idea why WalMart would carry them ahead of the website. (Test run maybe?) I expect the newer fx-115ES PLUS to be in all the major stores and on the Casio website soon.I checked out the picture of the fx-991ES PLUS again and it seems like the only thing added was the E and F variables. Either this is an old picture or the fx-115ES PLUS truly has more features. I thought the 991 was equivalent to the 115.
Hmmm.Yes, the Inequality Mode is displayed. That mode can solve inequalities involving quadratic or cubic equations. This is new (not on the 'classic' fx-115ES).Eddie. I've asked casio (Europe) through email about this.
And as I understood they suggested me checking fx 115 ES PLUS authenticity. (quotation from their response: 'We don't know a fx-115ES PLUS. Please ask the dealer about this model. Please make sure that it is a real Casio product.' That's probably because they know more about calculators produced for European market.
Anyways, I'm looking forward to buy the calculator like yours.:)And they suggested me buying fx-991DE PLUS, not ES, as it has the capability to solve the inequalities. It would be really nice to get one with capability of solving inequalities for my upcoming math exams. By the way, do you know maybe any store that could ship 'fx 115ES plus' to Europe? Thanks again, cheers! Hello Eddie!I found your blog while looking for a review. I bought this calculator (Casio 115ES Plus) couple of days ago and so far everything works great but I was just wondering if by any chance do you know if this calculator is capable of solving the value of X and Y using the 'Solve' button? Or perhaps I am not operating the calculator the right way?For example, the equation that I am trying to solve is: 4X^2 + 9Y^2 = 144 but I am only getting the value of X (6) But it would be nice to also have the value of Y.
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I know that this is possible in my TI-36X Pro.It will be even nicer if we can get a second solution for the X and Y values (in both calculators Casio 115ES Plus and TI-36X Pro).One last question: Perhaps somebody asked you this before but if you were to decide between this new Casio FX-11ES Plus and TI-36X Pro, which of them would you choose? And in one line. Eddie:I am back to your blog merely because I have a question regarding a particular problem with this calculator (and others calculators as well).Hopefully you can help me clear my doubts:Problem: a^2-5a-6 when a = -2I stored the value of A (which is -2) into this calculator by using the 'STO' button. Then I enter the problem into the calculator as it appears in my text book: a^2-5a-6 and then hit the 'equal button' and the result is 8.Now. The problem occurs when entering the problem with the variable already replaced into the calculator: -2^2-5a-6 the result is: 0Further explanation:For some reason the calculator assumes there is a parenthesis sign between the variable 'a' when replacing the value of variable A.In other words, when storing the value of the variable into the calculator and then entering the problem as it appears in the text book: a^2-5a-6 the calculator treats this problem as:(-2)^2-5a-6 and that is why the result is 8. AnonymousThank you for your reply Eddie but I still don't understand. Let me explain myself.When storing the value of the variable A (which is -2) into the Calculator (TI and Casio) and then entering the problem as it appears in my text book:a^2-5a-6NOT(a)^2-5a-6Why the calculator assumes there is a parenthesis between the variable a^2 = (a)^2?
The parenthesis is what makes the result different.In other words, if I were to solve the problem: a^2-5a-6 without a calculator I believe the answer should be 0 and not 8, is this correct? Omer,Thanks for writing.Derivative - the expression must contain the variable XKeystrokes:SHIFT∫ (d/dx)Syntax:Math Input: d/dx ( f(X) ) x = valueLinear Input: d/dx ( f(x), value )Example (Math Input):d/dx (X^2-5X+1) X=2 returns -1Integral - the expression must contain the variable XKeystrokes: ∫ Syntax:Math Input:b∫ f(X) dxaLinear Input:∫ (f(X), a, b)Example:3∫ 3X^2 - 1 dx = 240Solver. The calculator solves for any one variable, for any equation or expression. If an expression, the Solver solves for the roots (zeroes) of the expression.Steps:1. Enter the equation or expression. Type a comma after and the variable to solve for.
The latter step can be omitted if you are solving for X.2. Press SHIFT CALC (SOLVE)3. Enter a guess and press the equals key=.Example:Solve e^X - X = 2, use 7 as a guess.1.
Type 'e^X - X = 2, X'. (you can leave out the ',X' since we are solving for X).2. Press SHIFT CALC (SOLVE)3. Enter 7=.Result: X = 1.146193221.Hope this helps,Eddie. Kaustav1993,Sorry for being late with my response.I don't think you can go wrong with either one, 991ES or 36X, as both give roughly the same amount of features, though I like the interface of the 36X Pro better.If you decide to get the TI-36X make sure you test it first, because the bug has been corrected in newer production models. I had to push through plastic to make sure the π bug was gone.
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For that reason, I would not recommend getting a TI-36X Pro online (yet).Please let me know how it goes,Eddie. This is me, JCROOT again!How are you? I am big fan of your blog and I love calculators.I don't know if you already know this but there is a new version of the Casio FX-115ES Plus, it is called: Casio Classwiz FX-991EXI bought this new calculator from Casio but I am kind of disappointed since I believe it is missing some previous features from the FX-115ES Plus such as:1: The repeating decimal button, the LCM and GCD buttons and the Products of function f(x): ∏ f(x).It is worth the upgrade? Or those features were removed because they were not so useful?