# Mathematics Weblog

This site uses LatexRender for the mathematics

## Two Problems

Sunday 15 February 2004 at 3:34 pm | In Articles | Post Comment*Press ‘read more’ below for the answers*

1. Give an example of an easy calculation that most simple calculators get wrong

2. If find [*Hint: think carefully about before you differentiate*]

1. *try it!*

2. The domain of f is (the empty set) so it makes no sense to try to differentiate it. This is an example of why the domain of a function is as important as the rule given by the function

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