Enabling complex numbers on the Casio fx-991EX

Spent 10 minutes scratching my head before finally working out how to enable complex numbers on my new Casio calculator.

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More cancelling down from Block A Unit 1

Just about finished this book off, but I thought I’d add this article from my notes. It concerns page 35 which involves proving the conjecture that Fn+1/Fn –>Φ as n –> ∞ where Fn is the nth number in a Fibonacci sequence.

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Cancelling down powers – example from MS221

Reading through MS221 and had a struggle getting my head around question 5.2c. Here is my solution.

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Division symbol keyboard shortcut / HTML escape on Windows

Found this shortcut completely by accident today while I was attempting to use superscript in a Word document.

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Proving a square root is irrational

As part of my Open University degree I am studying MS221. I was interested in how it can be proven that a number is irrational. After much reading I thought I’d submit this article which explains hows to prove √3 is irrational in simple steps.

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Operations on sets by example

An example of different operations on sets, by example.

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