A-LevelMathematicsSeries9709/12 · Oct/Nov 2016 · Q810 Marks
How far will he travel on May 15th?
- (a)(i)How far will he travel on May 15th?[2]
- (a)(ii)On what date will he finish the event?[3]
- (b)(i)the first term of the progression,[4]
- (b)(ii)the sum to infinity of the progression.[1]
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2016). The mark or mark type is shown in brackets.
- [M1] Use of nth term with a = 200, n = 14 or 15and d = +/- 5.
- [A1] = 130
- [M1] Use of Sn a=200 and d = +/- 5.
- [A1] 5n² - 405n + 6100 (= 0)
- [A1] → 20
- [M1 A1] ar², ar⁵ → r = ½ Both terms correct.
- [M1 A1] Use of Sn = 31.5 with a numeric r.
- [B1^] Sum to infinity = 16/½ = 32 for their a and r with |r|<1.
Write your answer and get it marked
On Oracle Prep you can write or photograph your own answer and have it marked by AI against this mark scheme, with feedback on what you missed.
Sign up free →