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From users who are members of Transition to university :
Christian Lawson-Perfect
|
said | Ready to use | 4 years, 1 month ago |
Bradley Bush
|
said | Needs to be tested | 7 years, 5 months ago |
| Hannah Aldous | said | Needs to be tested | 7 years, 5 months ago |
| Lauren Richards | said | Has some problems | 7 years, 5 months ago |
| Vicky Hall | said | Has some problems | 7 years, 5 months ago |
From users who are not members of Transition to university :
| Ashley Cusack | said | Has some problems | 4 years, 1 month ago |
| lucia ramsey | said | Ready to use | 5 years, 7 months ago |
Deirdre Casey
|
said | Has some problems | 7 years, 1 month ago |
History
Christian Lawson-Perfect 4 years, 1 month ago
Saved a checkpoint:
I've fixed the advice for parts b and c - the power should be $n-1$, not $n$.
Christian Lawson-Perfect 4 years, 1 month ago
Gave some feedback: Ready to use
Ashley Cusack 4 years, 1 month ago
Gave some feedback: Has some problems
Ashley Cusack commented 4 years, 1 month ago
Advice for parts B and C is incorrect.
lucia ramsey 5 years, 7 months ago
Gave some feedback: Ready to use
Christian Lawson-Perfect 7 years, 1 month ago
Gave some feedback: Ready to use
Christian Lawson-Perfect 7 years, 1 month ago
Saved a checkpoint:
Looks like there was an off-by-one error.
Deirdre Casey commented 7 years, 1 month ago
In part b does not accept correct answer. Mistake also shown in the solutions.
Deirdre Casey 7 years, 1 month ago
Gave some feedback: Has some problems
Christian Lawson-Perfect 7 years, 4 months ago
Gave some feedback: Ready to use
Christian Lawson-Perfect 7 years, 4 months ago
Saved a checkpoint:
Gave the variables sensible names and reworded some of the advice.
Elliott Fletcher 7 years, 5 months ago
Published this.
Bradley Bush 7 years, 5 months ago
Gave some feedback: Needs to be tested
Bradley Bush commented 7 years, 5 months ago
Splitting into 3 questions with 3 parts each instead of 3 parts with 3 gaps
Christian Lawson-Perfect commented 7 years, 5 months ago
And like the other sequences questions, the advice would benefit hugely from a table.
Christian Lawson-Perfect 7 years, 5 months ago
Gave some feedback: Has some problems
Christian Lawson-Perfect 7 years, 5 months ago
Saved a checkpoint:
The gaps are all set as "mathematical expression", but there's no reason they shouldn't be "number entry" (apart from the formula part, obv.)
The parts of this question aren't coherent; you could keep the same sequence throughout, and ask the student to:
- Find the common ratio
- Give the formula for the $n$th term
- Calculate a given term.
Hannah Aldous 7 years, 5 months ago
Gave some feedback: Needs to be tested
Lauren Richards commented 7 years, 5 months ago
- Make sure i) and ii) etc are in italics both in the parts and the advice.
- I think I would capitalise "Common ratio" in part a).
- Advice content for a) is fine.
- Where you have stated what the formula for the geometric sequence is in part b) of the advice, I think you should explain that a is the first term and r is the common ratio.
- Make sure you use displaystyle to make the formula large.
- Think there might be a slight glitch in the advice of c) where you are trying to figure out the common ratio, it says a[3]*a[4]^3 instead of 375 as it was supposed to be in this case.
- Typo in the last sentence of the advice - it says "we can write substitute them into the formula..." - "We" should be capitalised and just scrap write.
Lauren Richards 7 years, 5 months ago
Gave some feedback: Has some problems
Hannah Aldous 7 years, 5 months ago
Gave some feedback: Needs to be tested
Vicky Hall commented 7 years, 5 months ago
It would also be helpful to give and exlain the formula for the $n$th term in the statement.
Vicky Hall 7 years, 5 months ago
Gave some feedback: Has some problems
Vicky Hall commented 7 years, 5 months ago
I have added a sentence to the statement to explain what is meant by the common ratio. I think part a) should include one sequence with a positive integer ratio, one with a negative integer ratio and one with a fractional ratio to cover all possibilities.
Hannah Aldous 7 years, 5 months ago
Gave some feedback: Needs to be tested
Hannah Aldous 7 years, 5 months ago
Created this.| Name | Status | Author | Last Modified | |
|---|---|---|---|---|
| Find and use the formula for a geometric sequence | Ready to use | Hannah Aldous | 03/11/2020 14:54 | |
| Deirdre's copy of Find and use the formula for a geometric sequence | draft | Deirdre Casey | 06/11/2017 12:40 | |
| Marte's copy of Find and use the formula for a geometric sequence | draft | Marte Bråtalien | 12/04/2018 14:12 | |
| Joël's copy of Find and use the formula for a geometric sequence | draft | Jo Cohen | 02/12/2020 15:42 | |
| Hallar el término general de una secuencia geométrica. | Ready to use | Luis Hernandez | 02/12/2020 15:42 | |
| Simon's copy of Find and use the formula for a geometric sequence | draft | Simon Thomas | 25/02/2019 10:50 | |
| Justin's copy of Find and use the formula for a geometric sequence | draft | Justin McGuinness | 14/05/2019 15:02 | |
| Find and use the formula for a geometric sequence | draft | Xiaodan Leng | 10/07/2019 21:48 |
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This question is used in the following exams:
- Sequences by Elliott Fletcher in Elliott's workspace.
- Geometric sequences by Christian Lawson-Perfect in Transition to university.
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- HI by Pádhraic O' Hanrahan in Numbas Workshop.
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- Geometric sequences by AJAY OTTA in AJAY's workspace.
- Week 7 Geometric sequences by Izabela Walczak in Izabela's workspace.
- Geometric sequence by Jinhua Mathias in Maths 3-2020.
- Numbas Assessment Test by Shelby Hanna in Shelby's workspace.
- Questions on probability by Christian Lawson-Perfect in Christian's workspace.
- Transition Frequencies by Chris Templet in Chris's workspace.
- claire's copy of Geometric sequences by claire lines in claire's workspace.
- Week 16 e-quiz by Ruth Douglas in Ruth's workspace.