Given that

show that

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- Aug 10th 2009, 10:39 AMTweetyproof
Given that

show that - Aug 10th 2009, 10:44 AMred_dog

- Aug 10th 2009, 10:55 AMTweety
Just been thinking, is this method correct?

multiply both sides by

- Aug 10th 2009, 10:56 AMBruno J.
This exact question was posted yesterday here : http://www.mathhelpforum.com/math-he...-identity.html

- Aug 10th 2009, 11:00 AMBruno J.
- Aug 10th 2009, 11:02 AMTweety

Well than they must be using the same excercise book as me, as my exam board is with edexcel, this is the book I am using!

Edexcel AS and A Level Modular Mathematics - Core Mathematics 3: Amazon.co.uk: Mr Keith Pledger: Books - Aug 10th 2009, 11:23 AMTweety
- Aug 10th 2009, 02:29 PMBruno J.
No, you are given that , from which you must deduce that .

You cannot use in your proof that because that is what you are trying to show. However that is what you seem to be doing in the third line : starting from , you replaced by . - Aug 11th 2009, 02:20 AMTweety