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    Hello everyone, I'm stuck on these AS maths questions for homework.

    Write down the 1st five terms of each sequence and give a recursive definition for it

    1) ur=r^2
    I've worked out the first 5 terms as 1,4,9,16,25 but I'm not sure how to find the recursive definition

    2) ur=1/2r(r+1)
    I've worked out the first 5 terms as 1,3,6,10,15 but can't find the recursive definition

    Thank you for the help!
 
 
 
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