Today I received a Casio fx-991 EX Classwiz which I purchased last week. Here is a short video of both an unboxing and a demo. I plan to a more detailed review pretty soon.
Eddie
A blog is that is all about mathematics and calculators, two of my passions in life.
RPN HP 12C: Fibonacci and Lucas Sequences Golden Ratio, Formulas, and Sequences Let φ be the Golden Ratio: φ = (1 + √5) ÷ 2...