O-LevelMathematicsAlgebra and graphs4024/11 · Oct/Nov 2014 · Q184 Marks
The term-to-term rule for a sequence is multiply the previous term by 3 and subtract 1. The first three terms in this sequence are 1, 2 and 5 . Write down the next two terms in this sequence.
- (a)The term-to-term rule for a sequence is multiply the previous term by 3 and subtract 1. The first three terms in this sequence are 1, 2 and 5 . Write down the next two terms in this sequence.[1]
- (b)The nth term of a second sequence is given by the expression 4n-3. Find the number in this sequence that is closest to 150.[1]
- (c)(i)The nth term of a different sequence is given by the expression n²+1. Write down the first four terms of this sequence.[1]
- (c)(ii)Hence write down an expression, in terms of n, for the nth term of the following sequence. 0 3 8 15[1]
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2014). The mark or mark type is shown in brackets.
- [1] (a) 14 41
- [1] (b) 149
- [1] (c)(i) 2 5 10 17
- [1] (c)(ii) n² - 1 oe
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