Recommendations Calculator
The fx-991ES PLUS is a brill calculator i can only recommend it. For SQA Advanced Highers it it fantastic to check if your integration/diff is right and for complex numbers. The calculator seems to have a half decent processor/ram so it does not seem to lag when typing in long equations, which my old Casio did. If you are planning to further your maths at university, i would save up and buy the Ti-84 plus.
What's New?
The number of available memories have increased from 7 to 9. (A, B, C, D, X, Y, M, and now E, F). Previously E and F were available only for the Hexadecimal mode.
You now have the ability to calculate using repeated numbers. For example, you can type the decimal form of 1/3 using 0.3 with the bar above the three. I believe that this is first line of calculators that has this ability.
* New number functions are: GCD, LCM, Integer Part, Fractional Part, Random Integers, Integer Division (÷R) that gives quotient and remainder, and Prime Factorization (up to three digit factors). To factor a number, enter it, press [ = ], then [SHIFT], [ º ' '' ].
* Products of function f(x): ∏ f(x).
* In Table Mode you can include two functions f(x) and g(x). This is turned on in SET UP.
* The [ALPHA] key acts as both as an variable key and a second shift key.
* The rref and ref functions are added to the Matrix Mode (but not eigenvalues).
* The fx-115ES PLUS has a curve design, and boasts a faster processor.
New Modes
* Inequality Solver of quadratic and cubic equations
* Verification mode, used for compare expressions (i.e. Does π/4 π/2? Does 1 = 9/9 = e^0?)
* Distribution mode: Normal Distribution (CDF, PDF, and Inverse (Yes!)), Binomial Distribution (CDF, PDF), and Poisson Distribution (CDF, PDF).
Final Thoughts
If the fx-115 ES was solid, then the fx-115ES PLUS is taking a great calculator and making it better. At about $18, you get a huge bang for the buck.
Rating: ***** (5 out of 5)
------------------------------------------------------------------------
UPDATE-CORRECTION
Many thanks the Seller krazy Deals for the best Item
The Solve feature can solve for more than just X. You can specify the variable as so:
equation, variable to solve for
If there is no second argument, then the variable to solve for defaults to X.
Example:
X - 2Y = 1, X solves for X
X - 2Y = 1, Y solves for YRead full review
Verified purchase: Yes | Condition: New
