C4 integration

pinesandapples2001

I need help with k😭
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Reply 1

graecusthegreek

partial fractions is a good way to start. you didn’t get it quite right and some other stuff too. i’ve uploaded my solution

Reply 2

graecusthegreek

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Reply 3

graecusthegreek

sorry ignore the binomial expansion screenshot

Reply 4

pinesandapples2001

Original post by graecusthegreek

partial fractions is a good way to start. you didn’t get it quite right and some other stuff too. i’ve uploaded my solution

Oh my god, you're literally a life saver. Thank you so much, thought I'd be stuck on this forever😅. Xx

Reply 5

graecusthegreek

Original post by Danielnovels25

Oh my god, you're literally a life saver. Thank you so much, thought I'd be stuck on this forever😅. Xx

no problem :smile:

if you want anymore help just @ me

Reply 6

pinesandapples2001

Original post by graecusthegreek

no problem :smile:

if you want anymore help just @ me

I need help with L, I'm so sorry.

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send as many probelsm as you want!

Reply 9

graecusthegreek

tell me if you can't read something :smile:

also don't apologize silly

Reply 10

graecusthegreek

the integral of cosec²x is a standard integral. not sure if it's in the formula booklet or not

Reply 11

pinesandapples2001

Original post by graecusthegreek

Wow, thank you so much again! Do you have any tips on how to know if your answer is right on the exam? Like, I obviously won't have the actual answer in the exam to check my answer, so how do I know if my answer is the actual answer?

Reply 12

graecusthegreek

Original post by Danielnovels25

do you have a calculator that can do numerical integration?
I usually just use my calculator to integrate the expression between 0 and 1 (or some other domain) and see what answer I get. I then put in the same limits for my answer. if they're the same then I'm pretty sure I've integrated correctly. does this make sense? I can go through an example if you want :smile:

Reply 13

graecusthegreek

let's say I want to integrate x (silly I know but it works as an example). I do some integration and think it's x²/3. so I go on my calculator and integrate x between 0 and 1 which would give me ½. but if I put in the limits 0 and 1 into my answer (x²/3) I would get ⅓ which isn't the same answer, so I know I've gone wrong somewhere. make sense?

Reply 14

pinesandapples2001

Original post by graecusthegreek

Yup, makes sense. Thank you sooooooooo much, honest. 🙏🏾😊😊😊

Reply 15

graecusthegreek

Original post by Danielnovels25

Yup, makes sense. Thank you sooooooooo much, honest. 🙏🏾😊😊😊

no problem :smile:

Reply 16

pinesandapples2001

@graecusthegreek I promise, I PROMISE this is the last one. M

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Reply 17

Notnek

Original post by graecusthegreek

Hi, in future please post hints instead of full solutions. Please read the posting guidelines, thanks :smile:

Reply 18

graecusthegreek

Original post by Notnek

Hi, in future please post hints instead of full solutions. Please read the posting guidelines, thanks :smile:

sorry i didn’t realise!

Reply 19

pinesandapples2001

Original post by graecusthegreek

sorry i didn’t realise!

Can u help with question m? I tried replacing all the x values in terms of u, but that didn't work. And then I tried saying y=x-2 and that didn't work either. :/