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### History

#### Checkpoint description

Describe what's changed since the last checkpoint.

Published this.

#### Christian Lawson-Perfect3 years, 6 months ago

Gave some feedback: Ready to use

#### Christian Lawson-Perfect3 years, 6 months ago

Saved a checkpoint:

This is fine. I had to add \left and \right around brackets in a couple of places so they stretch around the fractions inside.

#### Hannah Aldous3 years, 6 months ago

Gave some feedback: Needs to be tested

#### Elliott Fletcher3 years, 6 months ago

This is a really good question, i just have a couple of comments

Main Parts

a) and b) i would use a \displaystyle before the fractions in the questions to make the fractions look bigger.

a) in the very last calculation when you are factorising the quadratic, you write the constant term as a power of a different number like 4^3, i would just leave this as it's simplified number, e.g

x^2-30x-4^3 = 0 could be x^2-30x-64 = 0

b) There is a random ' after the ln on the first line here

I think you are just missing a few full stops after some equations. Specifically, the one before "We then just need to rearrange our equation" and the very last line where you give the final value of x.

#### Elliott Fletcher3 years, 6 months ago

Gave some feedback: Has some problems

#### Hannah Aldous3 years, 6 months ago

Gave some feedback: Needs to be tested

#### Hannah Aldous3 years, 6 months ago

Gave some feedback: Has some problems

#### Hannah Aldous3 years, 6 months ago

Gave some feedback: Doesn't work

#### Hannah Aldous3 years, 7 months ago

Gave some feedback: Needs to be tested

#### Stanislav Duris3 years, 7 months ago

Gave some feedback: Has some problems

#### Stanislav Duris3 years, 7 months ago

I feel like some parts in advice need a bit more explanation:

- In part a.iv) I think you should add a bit more explanation why the answer is always 0. Something along the lines that as $b^0 = 1$ then $\log_b(1) = 0$.

- In part b) at the end, "the only value for x is..." I feel should be something along the lines of "the only possible value for x is ...".

- In part c) "Laws for logarithms can also be applied to $\ln$." maybe you could add "as $\ln(x) = \log_e(x)$."

- Also, the last two lines of the advice is only right when p = 2. The right answer in advice always takes a square root rather than the appropriate root. Fix this.

There are some small mistakes in punctuation:

- Some parts are missing a blank space between the = and the gap.

- In advice, I feel like many of the commas you used are unnecesseary, for example "We need to use the rule," is followed by that rule so I would remove the comma so it flows better. You've done this correctly in part a.iii). Maybe if you want to keep the comma there, you should put comma after the rule/equation on the separate line as well, to make it stand out from the sentence. Similarly, "Subsituting in our values for x and y gives," I would remove these commas too for the same reason.

- You're missing a few full stops when your sentences finish with an equation in advice. For example, in part a) after the last line in each part i/ii/iii or last line of the whole advice, I think there should be full stops.

- In advice part b), near the end - "to write our equation as," is followed by two lines of equations. You put full stop after the first line by mistake, but it should be at the end of the second line. Just move the \text{.} to the end of that expression.

Finally, part c) asks for the answer to be put in the form $\frac{e^{a}}{b}$, but accepts answers in different forms such as ($(\frac{e^{m}}{q})^{1/p}$ or ${e^{a}}*{b^{-1}}$. I think this could be easily fixed by putting some required/forbidden strings in the string restriction for the question. I would advise trying "(e" and ")^" and "*" as forbidden strings and add "e" as a required string just to be sure. Hopefully that will fix this tiny problem.

#### Hannah Aldous3 years, 7 months ago

Gave some feedback: Needs to be tested

#### Hannah Aldous3 years, 7 months ago

Created this.
Combining Logarithm Rules to Solve Equations Ready to use Hannah Aldous 20/11/2019 14:34
Using Laws for Addition and Subtraction of Logarithms Ready to use Hannah Aldous 20/11/2019 14:44
Rearranging Logarithms involving Indices Ready to use Hannah Aldous 20/11/2019 14:44
MATH6058 Addition and Subtraction of Logarithms draft Catherine Palmer 09/10/2017 11:30
Raphael's copy of Rearranging Logarithms involving Indices draft Raphael Stuhlmeier 27/11/2017 16:06
Addition and Subtraction of Logarithms draft Ida Landgärds 16/04/2018 10:43
Ida's copy of Rearranging Logarithms involving Indices Ready to use Ida Landgärds 09/05/2018 06:55
spørsmål 3 draft Ida Landgärds 02/12/2020 15:42
Jonathan's copy of Using Laws for Addition and Subtraction of Logarithms draft Jonathan Kress 07/06/2018 01:10
Jeanne's copy of Using Laws for Addition and Subtraction of Logarithms draft Jeanne Parmentier 20/07/2018 09:31
Using Laws for Addition and Subtraction of Logarithms [L6 Randomised] Needs to be tested Matthew James Sykes 25/07/2018 11:08
Rearranging Logarithms involving Indices [L6] draft Abbi Mullins 24/07/2018 14:39
logarithms addition/subtraction [L6] draft Abbi Mullins 24/07/2018 14:49
NUMBAS-Logarithms (laws) Ready to use Katy Dobson 30/07/2018 10:39
David's copy of Using Laws for Addition and Subtraction of Logarithms Ready to use David Martin 21/09/2018 11:50
David's copy of Combining Logarithm Rules to Solve Equations draft David Martin 30/07/2018 14:34
David's copy of Rearranging Logarithms involving Indices Ready to use David Martin 17/10/2019 07:25
Joël's copy of Using Laws for Addition and Subtraction of Logarithms draft Jo Cohen 02/12/2020 15:42
Blathnaid's copy of spørsmål 3 draft Blathnaid Sheridan 02/12/2020 15:42
Algebra: Using Laws for Addition and Subtraction of Logarithms draft Clare Lundon 15/10/2018 21:45
cormac's copy of Ida's copy of Rearranging Logarithms involving Indices draft cormac breen 05/11/2018 13:37
cormac's copy of Ida's copy of Rearranging Logarithms involving Indices draft cormac breen 05/11/2018 13:38
cormac's copy of Ida's copy of Rearranging Logarithms involving Indices draft cormac breen 05/11/2018 13:54
Max's copy for Addition and Subtraction of Logarithms draft Max S 16/11/2018 23:50
Justin's copy of Using Laws for Addition and Subtraction of Logarithms draft Justin McGuinness 14/05/2019 14:55
Maria's copy of Rearranging Logarithms involving Indices draft Maria Aneiros 11/06/2019 05:32
Maria's copy of Using Laws for Addition and Subtraction of Logarithms draft Maria Aneiros 11/06/2019 05:30
Maria's copy of Combining Logarithm Rules to Solve Equations draft Maria Aneiros 25/05/2019 08:02
Using Laws for Addition and Subtraction of Logarithms draft Xiaodan Leng 10/07/2019 23:28
Logarithms (laws) draft Xiaodan Leng 10/07/2019 23:57
Using Laws for Addition and Subtraction of Logarithms draft Xiaodan Leng 11/07/2019 00:00
Addition and Subtraction of Logarithms draft Xiaodan Leng 11/07/2019 00:15
Rearranging Logarithms involving Indices draft Xiaodan Leng 11/07/2019 00:16
Combining Logarithm Rules to Solve Equations draft Xiaodan Leng 11/07/2019 01:39
Katy's copy of NUMBAS-Logarithms (laws) Ready to use Katy Dobson 20/09/2019 15:11
Katy's copy of Combining Logarithm Rules to Solve Equations draft Katy Dobson 03/09/2019 08:29
Katy's copy of Using Laws for Addition and Subtraction of Logarithms draft Katy Dobson 03/09/2019 08:29
Katy's copy of Rearranging Logarithms involving Indices Ready to use Katy Dobson 20/09/2019 15:12
Logs: All rules combined draft Kevin Bohan 02/10/2019 09:56
W2b - Using Laws for Addition and Subtraction of Logarithms Ready to use Timur Zaripov 10/10/2019 12:15
W2b - logarithms addition/subtraction [L6] draft Timur Zaripov 07/10/2019 14:06
W2b - Rearranging logarithms involving Indices Ready to use Timur Zaripov 10/10/2019 12:16
Rearranging Logarithms involving Indices draft Marie Nicholson 08/10/2019 15:56
Using Laws for Addition and Subtraction of Logarithms draft Marie Nicholson 08/10/2019 12:34
Rearranging Logarithms involving Indices draft Marie Nicholson 08/10/2019 12:41
Laws for Addition and Subtraction of Logarithms draft Marie Nicholson 08/10/2019 12:45
Logarithms (laws) draft Marie Nicholson 08/10/2019 12:45
Blathnaid's copy of Rearranging Logarithms involving Indices draft Blathnaid Sheridan 17/10/2019 20:05
Musa's copy of Addition and Subtraction of Logarithms draft Musa Mammadov 18/04/2020 15:14
claire's copy of Combining Logarithm Rules to Solve Equations draft claire lines 27/04/2020 13:36
claire's copy of Rearranging Logarithms involving Indices draft claire lines 27/04/2020 13:46
Musa's copy of 3 Addition and Subtraction of Logarithms draft Musa Mammadov 08/05/2020 02:19
Ahmed's copy of Rearranging Logarithms involving Indices draft Ahmed Al-Razaz 19/05/2020 00:36
ALG Leyes de Logaritmos Adición/Sustracción draft David Vanegas 02/12/2020 15:42
Jonathan's copy of Rearranging Logarithms involving Indices draft Jonathan Rae 17/08/2020 16:53
Using Laws for Addition and Subtraction of Logarithms Ready to use Vicky Hall 07/10/2020 12:48
Rearranging Logarithms involving Indices Ready to use Vicky Hall 07/10/2020 12:46
Ashley's copy of Using Laws for Addition and Subtraction of Logarithms draft Ashley Cusack 16/09/2020 20:31
Ashley's copy of Rearranging Logarithms involving Indices draft Ashley Cusack 13/10/2020 09:10
Using Laws for Addition and Subtraction of Logarithms draft Tom Goodale 21/09/2020 17:08
Rearranging Logarithms involving Indices draft Tom Goodale 21/09/2020 17:13
Using Laws for Addition and Subtraction of Logarithms Ready to use Timur Zaripov 12/10/2020 09:22
Rearranging Logarithms involving Indices Ready to use Timur Zaripov 12/10/2020 09:22
Combining Logarithm Rules to Solve Equations Ready to use Timur Zaripov 12/10/2020 09:22
Timur's copy of W2b - Rearranging logarithms involving Indices draft Timur Zaripov 09/10/2020 15:38
Rearranging Logarithms involving Indices Ready to use Wan Mekwi 13/10/2020 13:19
Combining Logarithm Rules to Solve Equations Ready to use Wan Mekwi 13/10/2020 13:22
Algebra - Using Laws for Addition and Subtraction of Logarithms Ready to use Apodytes-ATG apodytes 25/10/2020 18:57
Algebra - Combining Logarithm Rules to Solve Equations Ready to use Apodytes-ATG apodytes 25/10/2020 18:50
Spørsmål 3 draft Ida Landgärds 02/12/2020 09:43
claire's copy of Combining Logarithm Rules to Solve Equations BE1601 draft claire lines 11/12/2020 22:10
claire's copy of Combining Logarithm Rules to Solve Equations BE1601 draft claire lines 11/12/2020 22:13
claire's copy of Combining Logarithm Rules to Solve Equations BE1601 AMENDED draft claire lines 13/12/2020 19:35
Using Laws for Addition and Subtraction of Logarithms - basic draft Alessandro Cozzarini 13/01/2021 17:18
Alessandro's copy of Rearranging Logarithms involving Indices Has some problems Alessandro Cozzarini 15/01/2021 08:46

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