Question 5(10 marks)Given that {an is a sequence such that for all n 1nSn=∑n3+3n2@k=3k=1(a)Find an in terms of n.[5](b)Show thatn2+a2k(2n)!3kn!k=1[5]
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Question 5(10 marks)Given that {an is a sequence such that for all n 1nSn=∑n3+3n2@k=3k=1(a)Find an in terms of n.[5](b)Show thatn2+a2k(2n)!3kn!k=1[5]
