http://trevorpythag.co.uk/2009/mathematics/calculus/differentiation-from-first-principles-with-example/ Maths help and revision for GCSE, A/AS Level and Further Maths Thu, 17 May 2012 08:44:32 +0000 hourly 1 http://wordpress.org/?v=3.3.2 http://trevorpythag.co.uk/2009/mathematics/calculus/differentiation-from-first-principles-with-example/comment-page-1/#comment-238 Kirsty Thu, 26 Nov 2009 21:42:49 +0000 http://breakingwave.hyperphp.com/wordpress/?p=262#comment-238 Thank you, made it a lot clearer! xx Thank you, made it a lot clearer! xx

]]>