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  3 years, 11 months ago 
Bradley Bush  said  Needs to be tested  7 years, 2 months ago 
Hannah Aldous  said  Needs to be tested  7 years, 3 months ago 
Lauren Richards  said  Has some problems  7 years, 3 months ago 
Vicky Hall  said  Has some problems  7 years, 3 months ago 
From users who are not members of Transition to university :
Ashley Cusack  said  Has some problems  3 years, 11 months ago 
lucia ramsey  said  Ready to use  5 years, 4 months ago 
Deirdre Casey  said  Has some problems  6 years, 10 months ago 
History
Christian LawsonPerfect 3 years, 11 months ago
Saved a checkpoint:
I've fixed the advice for parts b and c  the power should be $n1$, not $n$.
Christian LawsonPerfect 3 years, 11 months ago
Gave some feedback: Ready to use
Ashley Cusack 3 years, 11 months ago
Gave some feedback: Has some problems
Ashley Cusack commented 3 years, 11 months ago
Advice for parts B and C is incorrect.
lucia ramsey 5 years, 4 months ago
Gave some feedback: Ready to use
Christian LawsonPerfect 6 years, 10 months ago
Gave some feedback: Ready to use
Christian LawsonPerfect 6 years, 10 months ago
Saved a checkpoint:
Looks like there was an offbyone error.
Deirdre Casey commented 6 years, 10 months ago
In part b does not accept correct answer. Mistake also shown in the solutions.
Deirdre Casey 6 years, 10 months ago
Gave some feedback: Has some problems
Christian LawsonPerfect 7 years, 2 months ago
Gave some feedback: Ready to use
Christian LawsonPerfect 7 years, 2 months ago
Saved a checkpoint:
Gave the variables sensible names and reworded some of the advice.
Elliott Fletcher 7 years, 2 months ago
Published this.Bradley Bush 7 years, 2 months ago
Gave some feedback: Needs to be tested
Bradley Bush commented 7 years, 2 months ago
Splitting into 3 questions with 3 parts each instead of 3 parts with 3 gaps
Christian LawsonPerfect commented 7 years, 2 months ago
And like the other sequences questions, the advice would benefit hugely from a table.
Christian LawsonPerfect 7 years, 2 months ago
Gave some feedback: Has some problems
Christian LawsonPerfect 7 years, 2 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, 3 months ago
Gave some feedback: Needs to be tested
Lauren Richards commented 7 years, 3 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, 3 months ago
Gave some feedback: Has some problems
Hannah Aldous 7 years, 3 months ago
Gave some feedback: Needs to be tested
Vicky Hall commented 7 years, 3 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, 3 months ago
Gave some feedback: Has some problems
Vicky Hall commented 7 years, 3 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, 3 months ago
Gave some feedback: Needs to be tested
Hannah Aldous 7 years, 3 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 
There are 7 other versions that do you not have access to.
Name  Type  Generated Value 


Error in variable testing condition
There's an error in the variable testing condition. Variable values can't be generated until it's fixed.
No variables have been defined in this question.
Generated value:
 :
This variable doesn't seem to be used anywhere.
No parts have been defined in this question.
Select a part to edit.
This gap is not used in the parent part's prompt.
The student will not be able to enter an answer to this gap.
Ask the student a question, and give any hints about how they should answer this part.
Pattern restriction
Variables
String restrictions
For each combination of answer and choice, specify the number of marks to add or subtract when the student picks it.
For each combination of answer and choice, write 1 if the student should tick it, or 0 if they should leave it unticked.
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:
This is an extension type part. There is no expected answer, and it's assumed that the marking depends on interactions within the part's prompt.
You can test this part's marking algorithm by interacting with the rendering of the part's prompt below.
Feedback
Score:
Question variables
These variables are available within the marking algorithm.
Name  Value  

Marking parameters
These values are available as extra variables in the marking algorithm.
Name  Value 

Part settings
These values are available as entries in the settings
variable.
Name  Value 

This feedback is based on your last submitted answer. Submit your changed answer to get updated feedback.
Warnings:
Alternative used:
These are the notes produced by this part's marking algorithm.
Note  Value  Feedback 




Click on a note's name to show or hide it.
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: 
A difference in feedback messages does not cause this test to fail. A difference in warnings does not cause this test to fail. 
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.
This part can't be reached by the student.
Add a "next part" reference to this part from another part.
None of the parts which can lead to this part are reachable either.
Next part options
Define the list of parts that the student can visit after this one.
Previous parts
This part can follow on from:
This part doesn't follow on from any others.
to
Choose a type for this new .
by  More information 
Select extensions to use in this question.

There was an error loading this extension.
Define rulesets for simplification and display of mathematical expressions.
Builtin constants
Custom constants
Names  Value  LaTeX  

Add styling to the question's display and write a script to run when the question is created.
Use this tab to check that this question works as expected.
There was an error which means the tests can't run:
Part  Test  Passed? 

Hasn't run yet
Running
Passed
Failed

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.
 Week 7 Geometric sequences by Izabela Walczak in Izabela's workspace.
 Geometric sequence by Jinhua Mathias in Maths 32020.
 Numbas Assessment Test by Shelby Hanna in Shelby's workspace.
 Questions on probability by Christian LawsonPerfect 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 equiz by Ruth Douglas in Ruth's workspace.