Past Papers’ Solutions | Edexcel | AS & A level | Mathematics | Core Mathematics 1 (C1-6663A/01) | Year 2014 | January | Q#5

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Question

Given that for all positive integers n,

a)   find the value of

b)  Find the value of

Solution

a.    

We are given that;

We are required to find .

Therefore, we substitute n=5;

b.    

We are required to find .

We can find  as follows;

Therefore ;

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