Date | May 2017 | Marks available | 3 | Reference code | 17M.1.SL.TZ2.T_5 |
Level | Standard Level | Paper | Paper 1 (with calculator from previous syllabus) | Time zone | Time zone 2 |
Command term | Find | Question number | T_5 | Adapted from | N/A |
Question
Tomás is playing with sticks and he forms the first three diagrams of a pattern. These diagrams are shown below.
Tomás continues forming diagrams following this pattern.
Tomás forms a total of 24 diagrams.
Diagram is formed with 52 sticks. Find the value of .
Find the total number of sticks used by Tomás for all 24 diagrams.
Markscheme
* This question is from an exam for a previous syllabus, and may contain minor differences in marking or structure.
(M1)(A1)
Note: Award (M1) for substitution into the formula of the th term of an arithmetic sequence, (A1) for correct substitution.
(A1) (C3)
[3 marks]
OR (M1)(A1)(ft)
Notes: Award (M1) for substitution into the sum of the first terms of an arithmetic sequence formula, (A1)(ft) for their correct substitution, consistent with part (a).
924 (A1)(ft) (C3)
Note: Follow through from part (a).
[3 marks]