Mathematics · Oct / Nov 2020 · Paper 42 · Question 11
0580
As printed in the paper
The question as text
Sequence 1st term 2nd term 3rd term 4th term 5th term nth term A 13 9 5 1 B 0 7 26 63 C 8 7 8 16 32 9 64 10
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
11(a)[10]
A : –3 17 – 4n oe B : 124 n3 – 1 oe C : 11 n + 6 128 oe 2 + n 2 [3]
B1 for –3
B2 for 17 – 4n oe
or B1 for k – 4n oe or 17 – pn oe, p ≠ 0 3
B1 for 124
B2 for n3 – 1 oe
or B1 for any cubic 4
B1 for 11 128 n + 6
B3 for oe 2 + n 2 2 + n 2
or B2 for oe seen
or B1 for 2k oe or n + 6 seen
11(b)[2]
p + 1 q oe 2 [2]
B1 for p + 1 or 2q oe
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