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    Hello..

    It seems that FP1 and C3 (The two modules I'm doing at the moment) involve a lot of simplifying to get the final answer. Although I had to do this in earlier modules, this is a lot harder.

    For example, if you take a look at http://www.wolframalpha.com/input/?i...n%2B1)(2n%2B1)

    The input being how my answer is at the moment, and the first alternate form being how the textbook has it.

    How do they simplify this, and how do I get better at simplification in general? It's my downfall at the moment :/
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    Normally it's just a case of taking out common factors.

    In this case, you can take out \dfrac{1}{12}n(n+1) as a common factor (I chose 12 because it's the lcm of 4 and 6). Normally you then end up with another factor which contains a quadratic which you have to factorise. It's harder than what you'd expect to do in C1-2, but it's doable with C1-2 techniques.

    The key (at least in FP1 summation questions) is just looking for common factors and then chomping through the algebra. With C3, it's more of the same really.
 
 
 
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Updated: September 26, 2010

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