Past Papers’ Solutions | Edexcel | AS & A level | Mathematics | Core Mathematics 1 (C1-6663/01) | Year 2013 | January | Q#4
A sequence satisfies
Given that ,
a) Find the value of and the value of .
b) Evaluate .
We are given that sequence is defined by
We are given that and required to find .
We can utilize the given expression for general terms beyond first term as;
Similarly, we can find .
We are required to find;
It is evident that we are required to find sum of first 4 terms.
We have already found 3rd and 4th terms and are given 2nd terms in (a). We need to find 1st term.