Mathematics · Oct / Nov 2021 · Paper 21 · Question 16
0580
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Find the nth term of each sequence.
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16(a)[2]
n3 + 7 oe final answer [2]
B1 for any cubic or for 3rd differences of 6
16(b)[3]
n + 1 oe final answer 4 − n 1 [3]
B1 for n + 1
B2 for 4n – 1 oe
or B1 for 4n – k oe k can be 0 Maximum 2 marks if not correctly combined as a fraction
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