A-level Maths Study Group 2020-21!

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Reply 960

o_reo

Original post by CaptainDuckie

Tbh you could do it U sub too, doesn’t really matter, I don’t think

Reply 961

CaptainDuckie

Study Forum Helper

Original post by o_reo

Wait, you have applied log rules wrong.

You’re meant to have put ln(81/16) 7/6

You only divide inside brackets

(edited 4 years ago)

Reply 962

o_reo

Original post by CaptainDuckie

Wait, you have applied log rules wrong.

You’re meant to have put ln(81/16) 7/6

oh my days
I always get the most simple part wrong
thank you so much though for taking your time to help me ah im so sorry

Reply 963

CaptainDuckie

Study Forum Helper

Original post by o_reo

oh my days
I always get the most simple part wrong
thank you so much though for taking your time to help me ah im so sorry

Yeah, it’s alright man lol

Only inside brackets to divide, not the whole thing :smile:

Reply 964

CaptainDuckie

Study Forum Helper

Original post by o_reo

oh my days
I always get the most simple part wrong
thank you so much though for taking your time to help me ah im so sorry

Also, idk if I’m just being picky but try using () for second line brackets when evaluating instead of square brackets.

And modulus around X-1

(edited 4 years ago)

Reply 965

o_reo

Original post by CaptainDuckie

Also, idk if I’m just being picky but try using () for second line brackets when evaluating instead of square brackets.

And modulus around X-1

ok will do thank you!

Reply 966

Notnek

Original post by g7720597

Could someone please tell me where I have gone wrong, really need help thanks part A

Is that all your working? You haven't finished the question...

Reply 967

aistudent

Original post by laurawatt

Welcome to the A-level maths study group! :woo:

This is basically where you can chat to others about the subject, rant about it, ask questions etc.! There seems to be loads of people doing maths on the year 13 thread so what better than to have a group dedicated to it?! :h:

So to break the ice a little, there's a few questions you can answer below if you want :biggrin:

> Are you in year 12 or year 13?
> What exam board are you on?
> Why did you pick maths?
> Current thoughts on the subject?
> Out of the topics you've covered so far, what's been your favourite and what has been your least favourite - and why?
> Are you taking further maths?

specifications:
AQA - AS // A-level
Edexcel - AS // A-level
OCR- AS // A-level
MEI- AS // A-level
CIE- 2019 exams // 2020 exams onwards
WJEC- AS/A-level

If you know of any good resources that aren't in the list below please feel free to mention them so they can edited into the list!
resources:

Spoiler

credits to @Toastiekid for the OP shamelessly taken from last year's thread :mmm:

Heya
I’m currently in year 12
I’m doing Edexcel :smile:

I picked maths because I was mostly inspired by my family so it makes me feel more connected with them. Another reason is because I love maths overall ; I love the feeling after all the hard work you’ve put into a topic it finally clicks and you get it right.
Maths can be difficult but once you get it it’s bloody amazing
My favourite topic would probably be anything in mechanics and my least favourite would be circles ahaha

Reply 968

Notnek

Original post by g7720597

I keep getting 9.10

Your working is perfect and I get 0.17 from your working so it's just the final step that's going wrong for you. Do you have any more working after that or did you then just use your calculator?

(edited 4 years ago)

Reply 969

Notnek

@g7720597 I think I may have found your mistake. Read the acceleration given in the question carefully and double check it's what you are using.

Reply 970

g7720597

Original post by Notnek

@g7720597 I think I may have found your mistake. Read the acceleration given in the question carefully and double check it's what you are using.

do you need to find the acceleration at a

Reply 971

Notnek

Original post by g7720597

do you need to find the acceleration at a

I'm not sure what you mean. Are you sure you're not using

\frac{545}{625}

instead of

\frac{543}{625}g

for the acceleation?

That would explain why you got something around 9.1 instead of 0.17.

(edited 4 years ago)

Reply 972

g7720597

Original post by Notnek

I'm not sure what you mean. Are you sure you're not using

\frac{545}{625}

instead of

\frac{543}{625}g

for the acceleation?

That would explain why you got something around 9.1 instead of 0.17.

omg thank you i have just spent hours trying to figure out why i was wrong

Reply 973

Notnek

Original post by g7720597

omg thank you i have just spent hours trying to figure out why i was wrong

I thought my last post would have made you realise but it didn't :smile:

Reply 974

a.dsouza1_

Hi I have a question,

How are we supposed to know how many values do we have to give for a trigonometry question?

Thank you so much in advance

(edited 4 years ago)

Reply 975

Notnek

Original post by a.dsouza1_

Hi I have a question,

How are we supposed to know how many values do we have to give for a trigonometry question?

Thank you so much in advance

It depends on the question but often you are given a set range e.g. solve this equation for 0 < x < 360 so you would need to find all solutions within this range.

If you have a query about a specific question then please post it.

Reply 976

a.dsouza1_

Original post by Notnek

Yes I do this one, part b

Thank you so much in advance :smile:

(edited 4 years ago)

Reply 977

Notnek

Original post by a.dsouza1_

Yes I do this one, part b

Thank you so much in advance :smile:

So you need to find all solutions between 0 and 360 inclusive. How many answers is different for every question.

If you need further help with this questions please post your working.