O-LevelMathematicsAlgebra and graphs4024/11 · May/June 2020 · Q235 Marks
The formula for the nth term of a sequence is 2n³. Find the 3rd term of this sequence.
- (a)The formula for the nth term of a sequence is 2n³. Find the 3rd term of this sequence.[1]
- (b)(i)Here are the first four terms of another sequence. 4/3, 9/5, 16/7, 25/9. Write down the next term of this sequence.[1]
- (b)(ii)Find a formula for the nth term of this sequence.[3]
Mark scheme
Marking points from the official mark scheme (May/June 2020). The mark or mark type is shown in brackets.
- [1] 54
- [1] 36/11
- [3] (n+1)² / (2n+1) oe
- [3] B2 for 2n + 1 oe
- [3] OR
- [3] B1 for (n + 1)² oe
- [3] B1 for 2n associated with 3, 5,7,9
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