Date | November 2020 | Marks available | 2 | Reference code | 20N.1.SL.TZ0.T_15 |
Level | Standard Level | Paper | Paper 1 | Time zone | Time zone 0 |
Command term | Find | Question number | T_15 | Adapted from | N/A |
Question
Mia baked a very large apple pie that she cuts into slices to share with her friends. The smallest slice is cut first. The volume of each successive slice of pie forms a geometric sequence.
The second smallest slice has a volume of . The fifth smallest slice has a volume of .
Find the common ratio of the sequence.
Find the volume of the smallest slice of pie.
The apple pie has a volume of .
Find the total number of slices Mia can cut from this pie.
Markscheme
* This question is from an exam for a previous syllabus, and may contain minor differences in marking or structure.
and (M1)
Note: Award (M1) for both the given terms expressed in the formula for .
OR
(M1)
Note: Award (M1) for a correct equation seen.
(A1) (C2)
[2 marks]
OR (M1)
Note: Award (M1) for their correct substitution in geometric sequence formula.
(A1)(ft) (C2)
Note: Follow through from part (a).
[2 marks]
(M1)
Note: Award (M1) for correctly substituted geometric series formula equated to .
(slices) (A1)(ft) (C2)
Note: Follow through from parts (a) and (b).
[2 marks]