Seriously sir, thank you so much for these videos because i'm failing maths right now but i'm so glad I've found your website! Hopefully i can pass this year! you need to advertise more because i know 100% that a level maths pupils who are struggling need to know about your website :)

@ExamSolutions_Maths

10 жыл бұрын

Well it's good to hear that the videos are helping. As for advertise more. Well advertising is expensive and since this is a free site ....

@paypal2267

9 жыл бұрын

ExamSolutions I really hope you get the donations you deserve. You help so many people doing this and it's not just about the money - you should take pride in the fact you're doing something useful with your life even though it's not for your own self-gain. You truly are a great man and very selfless.

@mykcltherapy

7 жыл бұрын

mr exam solutions how would you find the nth term, (the number on top of the sigma) if it is not given to you

@anthony1003

4 жыл бұрын

If your given all the terms on the right hand side of the equation then count the total number of them, in the 3 3 3 3 3 example in the video n= 5

Thanks for pointing that out. Something weird is going on as this has happened before to other videos.

Always appreciated.

such a very productive tutorial it was

Thank you very much, I've passed word to anyone I know who needs math help. Your videos thoroughly explain and yet so easily understandable! Excellent work!

Sitting in two hour lectures and going over this twice, I didn't have a clue what was going on. 10:06 of watching your video and I understand what is now going on. Thank you so much!

@ExamSolutions_Maths

8 жыл бұрын

+Jamie pine Well done

this was amazing. if my handwriting was as good as him, I would be so proud of myself

Thanks, your videos are really good and help me a lot :)

Thankyou so much, I have Core 1 and 2 coming up soon and your videos really help! Happy New Year sir!

Another very helpful video. Big thank you.

thank you, a lot clearer now :)

Use S=a(1-r^n)/(1-r) where S is the sum of the first n terms, a, the first term and r the common ratio. Best to go on my website rather than KZread and look in the index for the sum of a GP.

Lifesaver!

@Usernameandpass Yes: Go on my website and look in the index

finally, i manage to read this sigma thing. thanks!

Thank you! This explanation was so clear and concise. Great work!

@ExamSolutions_Maths

6 жыл бұрын

Thank you for watching.

Thank you

How do you get 12/r. What's it called? And if there was a question giving you the sequence 12,6,4,3... how would you go back to find 12/r as the rule?

thanks!!!!

Always wondered what this means on wikipedia :D awesome tutorial... so clear O_O

Thanks for this. I took Intro to Stats last spring. And taking Econometrics.... first thing we reviewed in Econometrics is Summation Notation. Guess what? I didn't learn that in Intro to Stats So thank you

@ProfessorND Cheers

YOU ARE A MEGA TEACHER !! CHEERS UP ;P

Thank you so much. One question though, when the term on top of sigma is n, what do you do? Up to how many numbers do you go to?

it help a lot :D

Thank you Sir I have been struggling to workout these problems

@ExamSolutions_Maths

5 жыл бұрын

Pleased to read your having some success at last.

OH and I forgot to say Thanks for the vids, I will convince my parents to donate to you after your vids help me get an A.

thx, really helped

@danzplaya

3 жыл бұрын

Nigga shut the fuck up with yo jimmy neutron sheen ass

Nice thanks :-)

cheers

@froet213kil No probs.

@JimJam95XXX Happy New Year to you and all the best with your exams

@ExamSolutions YOU'RE AWESOME ! xD

One question, I know that for geometric series there is a formula for a large sum, just as there is one for arithmetic series. So, is there one for this type of problems? I have to solve one exercise which has a sum up to 20 and I doubt that I have to do each one manually...

Hey, great video however I was wondering what if r is not equal to 1? n Sigma r=12 af(r) for example i.e. Would: n = 20, r = 12 20 Sigma r = 12 (3r) be equal to 3 20 Sigma r = 12 (r)

At 9:35, wouldn't it be S = n-b(a) - 'b' being the original r value? As a general rule, it'd only work for examples where r=1?

Ok but what if you have big numbers like 50 or 100?

@darcyvvalencia

8 жыл бұрын

elipsis

its not just a funny symbol anymore its a mathematical tool for the creation of all !

i wanted to know that how you solve 05:45 - 06:50 of video.

I THINK IT WOULD BE BETTER IF YOU ADD AN EXAM QUESTION AT THE END OF THE VIDEO AND GIVE US SOME TIME TO DO IT .. AND AFTERWARDS GIVE US THE SOLUTION DAT WAY WE KNOW THAT WAT TYPE OF QUESTIONS TO EXPECT IN THE EXAM :)

is this there in C2 or is it from C4 ?

@iDontcare_000

7 жыл бұрын

This is Further Pure 1. You might not what to learn sigma. Good luck in Core 2 next Wednesday.

what does the 'a' stand for?

@ExamSolutions_Maths

9 жыл бұрын

a is a constant. Any number that is.

Sir,how do we find general term of a series for example:find the general term for the following series 2-4+6-8+....-100..can u please reply 😰😥😓😢😨

@GreenTornado

6 жыл бұрын

Marissa Hosein You might not need it anymore since you wrote your comment two years ago, but it might help someone else. The nth term of a geometric series ar^n-1, where; a=the first number of the sequence r= the common ratio (to find that, divide the second number by the first (in your example, you would divide -4 by 2, which is -2)) So, if I am correct, the nth term is 2(-2)^n-1.

How did I do this with logs?!?!?!?!?!?!?!?!

I hope this comment motivates/inspires you to continue to make math vids.

@ExamSolutions_Maths

10 жыл бұрын

Yep

@immasmiler7520

10 жыл бұрын

ExamSolutions thst's great, because you're really good