Loading...
Error
There was an error loading the page.
Taxonomy:
Contributors
Feedback
From users who are members of Transition to university :
Christian LawsonPerfect  said  Ready to use  2 years, 6 months ago 
Bradley Bush  said  Needs to be tested  2 years, 11 months ago 
Hannah Aldous  said  Needs to be tested  2 years, 11 months ago 
Lauren Richards  said  Has some problems  2 years, 11 months ago 
Vicky Hall  said  Has some problems  2 years, 11 months ago 
From users who are not members of this Transition to university :
lucia ramsey  said  Ready to use  1 year ago 
Deirdre Casey  said  Has some problems  2 years, 7 months ago 
History
lucia ramsey 1 year ago
Gave some feedback: Ready to use
Christian LawsonPerfect 2 years, 6 months ago
Gave some feedback: Ready to use
Christian LawsonPerfect 2 years, 6 months ago
Saved a checkpoint:
Looks like there was an offbyone error.
Deirdre Casey 2 years, 7 months ago
In part b does not accept correct answer. Mistake also shown in the solutions.
Deirdre Casey 2 years, 7 months ago
Gave some feedback: Has some problems
Christian LawsonPerfect 2 years, 10 months ago
Gave some feedback: Ready to use
Christian LawsonPerfect 2 years, 10 months ago
Saved a checkpoint:
Gave the variables sensible names and reworded some of the advice.
Elliott Fletcher 2 years, 10 months ago
Published this.Bradley Bush 2 years, 11 months ago
Gave some feedback: Needs to be tested
Bradley Bush 2 years, 11 months ago
Splitting into 3 questions with 3 parts each instead of 3 parts with 3 gaps
Christian LawsonPerfect 2 years, 11 months ago
And like the other sequences questions, the advice would benefit hugely from a table.
Christian LawsonPerfect 2 years, 11 months ago
Gave some feedback: Has some problems
Christian LawsonPerfect 2 years, 11 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 2 years, 11 months ago
Gave some feedback: Needs to be tested
Lauren Richards 2 years, 11 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 2 years, 11 months ago
Gave some feedback: Has some problems
Hannah Aldous 2 years, 11 months ago
Gave some feedback: Needs to be tested
Vicky Hall 2 years, 11 months ago
It would also be helpful to give and exlain the formula for the $n$th term in the statement.
Vicky Hall 2 years, 11 months ago
Gave some feedback: Has some problems
Vicky Hall 2 years, 11 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 2 years, 11 months ago
Gave some feedback: Needs to be tested
Hannah Aldous 2 years, 11 months ago
Created this.Name  Status  Author  Last Modified  

Find and use the formula for a geometric sequence  Ready to use  Hannah Aldous  20/11/2019 14:38  
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  Joël Cohen  27/08/2018 12:35  
Hallar el término general de una secuencia geométrica.  Ready to use  Luis Hernandez  14/01/2019 13:17  
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 
No variables have been defined in this question.
This variable doesn't seem to be used anywhere.
Name  Type  Generated Value  

Error in variable testing condition
There's an error in the condition you specified in the Variable testing tab. Variable values can't be generated until it's fixed.
No parts have been defined in this question.
Select a part to edit.
Ask the student a question, and give any hints about how they should answer this part.
Pattern restriction
Variables
String restrictions
Answers  

Choices 
Test that the marking algorithm works
Check that the marking algorithm works with different sets of variables and student answers using the interface below.
Create unit tests to save expected results and to document how the algorithm should work.
There's an error which means the marking algorithm can't run:
Name  Value  

Note

Value  Feedback 


Click on a note's name to show or hide it. Only shown notes will be included when you create a unit test.
Unit tests
No unit tests have been defined. Enter an answer above, select one or more notes, and click the "Create a unit test" button.
The following tests check that the question is behaving as desired.
This test has not been run yet This test produces the expected output This test does not produce the expected output
This test is not currently producing the expected result. Fix the marking algorithm to produce the expected results detailed below or, if this test is out of date, update the test to accept the current values.
One or more notes in this test are no longer defined. If these notes are no longer needed, you should delete this test.
Name  Value 

Note  Value  Feedback  

This note produces the expected output  Current: 


Expected: 

This test has not yet been run.
When you need to change the way this part works beyond the available options, you can write JavaScript code to be executed at the times described below.
To account for errors made by the student in earlier calculations, replace question variables with answers to earlier parts.
In order to create a variable replacement, you must define at least one variable and one other part.
Variable  Answer to use  Must be answered?  

The variable replacements you've chosen will cause the following variables to be regenerated each time the student submits an answer to this part:
These variables have some random elements, which means they're not guaranteed to have the same value each time the student submits an answer. You should define new variables to store the random elements, so that they remain the same each time this part is marked.
to
This question is used in the following exams:
 Sequences by Elliott Fletcher in Elliott's workspace.
 Geometric sequences by Christian LawsonPerfect in Transition to university.
 Geometric sequences by steve kilgallon in Graphs and series.
 HI by Pádhraic O' Hanrahan in Numbas Workshop.
 Stuff by Shane Walsh in Shane's workspace.
 Example exam by Emma Howard in Emma's workspace.
 First Test by John Sheekey in John's workspace.
 My first test by Marie Nicholson in Marie's workspace.
 Test on some stuff by Christian LawsonPerfect in Christian's workspace.
 P12  Series & Sequences by Rob Beckett in Rob's workspace.
 WorkshopPracticeExam by Jessica Doherty in Jessica's workspace.
 Practice by Tasleem Akhtar in Tasleem's workspace.
 Possible applicable questions from previous year by Tom Bold in Transition to university maths.
 Geometric sequences by AJAY OTTA in AJAY's workspace.