Lauren Richards

Lauren Richards commented on Find and use the formula for a geometric sequence 6 years, 10 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 on Find and use the formula for a geometric sequence 6 years, 10 months ago

Gave some feedback: Has some problems

Lauren Richards commented on Use the factor theorem to identify factors of a polynomial 6 years, 10 months ago

• Remember a full stop at the end of the question in part a). 
• I think it is a really good question, and I can't really find anything wrong with it! 
• Would maybe be quite good if you could add a second part, increasing in difficulty, but it is up to you! It really is fine as it is. 

Lauren Richards commented on Completing the square 6 years, 10 months ago

• Great question but some minor changes: 
• Remember to full stop the end of your maths in each section of the advice. 
• Your advice doesn't match the parts. The advice has writing for a)i), ii) and iii) but there are only questions i) and ii). There is also advice for b)i), ii) and iii) and yet only one question for b). 
  a)ii) shouldn't be in the advice - that does not correspond to any question. b)ii) and b)iii) shouldn't be there either. 
• In d), the answer for x1 and x2 were switched around in the advice. The advice is the incorrect version. 
• Check the working for c)i), I am not sure that it is correct but it does end up with the right answer. Where does the last term from the original expression go and where do the two numbers in the penultimate line appear from? Same for c)ii). 
• part d) - is the square of the integer in the bracket supposed to be in the form 2^2 rather than 4? Everywhere else in the question it has been in the form 4. 

Lauren Richards on Completing the square 6 years, 10 months ago

Gave some feedback: Has some problems

Lauren Richards on Decimals to fractions 6 years, 10 months ago

Gave some feedback: Needs to be tested

Lauren Richards commented on Solving linear inequalities 6 years, 10 months ago

• I don't think you should ask everyone to put their answers as fractions when they're not needed to be in that form. Maybe add a bit saying "where applicable" at the end. 
• Remember to have full stops at the end of each section of your advice. 
• I don't think you need the section describing that c) is a mix of a) and b). Just state what you have to do. Also, as you have it right now, there is a typo - in instead of an.
• Good to highlight dividing by a negative number in part d). 
• Typo in part g) of the advice - "rearraniging" instead of rearranging.
• The advice for part g) is not quite right. the integer does not have the correct sign for the middle two sections of your workings then suddenly has corrected itself by the last line. 

Lauren Richards on Solving linear inequalities 6 years, 10 months ago

Gave some feedback: Has some problems

Lauren Richards on Laws of Indices 6 years, 10 months ago

Gave some feedback: Has some problems

Lauren Richards commented on Laws of Indices 6 years, 10 months ago

• I would scrap the first sentence of the statement. It should be in the description. I think I would just write "Using the laws of indices, simplify each expression down to its simplest form." The bit that you have afterwards that states "Recall that a^0=1..." didn't apply to any of the questions I was given, and it seems to be a random place to have this bit of info. 
• In part c), you suggested that the user could use the rule a^-m=1/a^m but when I tried to write my answer in that form it did not accept it. I wouldn't suggest you suggest to the user to use the second rule. 
• Typo in part b) of the advice - explicity instead of explicitly. 
• I'm not sure, but I don't know if the advice for the alternative method of part c) is correct or clear enough. I thought that that rule was a way of reorganising the fraction rather than actually calculating stuff and that if you used it, the final answer of (8a^4)/(3a^6) would be 8/(3a^2) not 8/3(a^-2). I may well be wrong hahaha so just ignore me if so! 
• I think you're missing a \displaystyle in part e) of the advice. 
• I think the bit you have written at the end of part e) "This can be simplified further if possible." is a bit random. I would scrap it. 
• I think you're missing some displaystyles in part f) of the advice as well. 
• I think generally the question is very good and the advice is very clear and concise!