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# Edexcel Mathematics: Core C1 6663 17th May 2017 [Exam Discussion] watch

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1. when theres 100 on top of the sigma
am i supposed to look for a pattern
2. (Original post by mathshelppp)
when theres 100 on top of the sigma
am i supposed to look for a pattern

@RDKGames
yes normally you will see a pattern, for example, each term of the sequence might be 5, so you'd multiply 5 by the number of terms.
3. Are you completely sure that your value for C is correct and that you've integrated correctly?
4. who thinks proof for sum of arithmetic series will come up?
5. (Original post by NRose12)
who thinks proof for sum of arithmetic series will come up?
I have hopes but, I'm doubting it.
6. (Original post by NRose12)
yes normally you will see a pattern, for example, each term of the sequence might be 5, so you'd multiply 5 by the number of terms.
so for c)
its like this: 1, -1/1 + 1 -1/2

not sure what to do next
7. (Original post by NotKidding)
Are you completely sure that your value for C is correct and that you've integrated correctly?

I did part b of question 10 You don't need to integrate use the differentiated equation they give you and equate it to the inverse of the gradient as it is perpendicular .
8. (Original post by mathshelppp)
so for c)
its like this: 1, -1/1 + 1 -1/2

not sure what to do next
im not sure what question you are referring to
9. (Original post by rayyanbkc)
I did part b of question 10 You don't need to integrate use the differentiated equation they give you and equate it to the inverse of the gradient as it is perpendicular .
Can you post the full question/link the paper? Would be a lot easier to help you that way
10. (Original post by NRose12)
im not sure what question you are referring to
11. (Original post by NotKidding)
Can you post the full question/link the paper? Would be a lot easier to help you that way
Oh lol I didn't ask for help check my original post I posted it as a solution for someone else .

Here's the question anyways - Scroll to question 10 part B

http://onmaths.com/mock_exams/edexce...17-prediction/
12. (Original post by rayyanbkc)
Oh lol I didn't ask for help check my original post I posted it as a solution for someone else .

Here's the question anyways - Scroll to question 10 part B

http://onmaths.com/mock_exams/edexce...17-prediction/
You can't scroll down it's an electronic paper where you start on Q1 and have to mark each question before moving to another...

Take a screenshot and post it instead
13. (Original post by NotKidding)
You can't scroll down it's an electronic paper where you start on Q1 and have to mark each question before moving to another...

Take a screenshot and post it instead

14. (Original post by mathshelppp)
so for c)
its like this: 1, -1/1 + 1 -1/2

not sure what to do next
the sequence is 1, -0.5, 1, -0.5....., and because you want the sum of the first 100 terms, you can just do 50 times the sum of the first 2 terms (because each set of 2 terms is the same)
so you would get 50*(1-0.5) which is equal to 25.
15. (Original post by mathshelppp)
It's 1, -1/2, 1, -1/2 etc. Try working out the second term again.

So you do (50 x 1) + (50 x -1/2) =50-25 =25
16. (Original post by boaconstricta)
It's 1, -1/2, 1, -1/2 etc. Try working out the second term again.

So you do (50 x 1) + (50 x -1/2) =50-25 =25
yeah thats what i got, that was a typo

thanks xx
17. (Original post by rayyanbkc)
Just did the question and got both parts right. Was it just part b that you got wrong?
18. (Original post by NotKidding)
Just did the question and got both parts right. Was it just part b that you got wrong?
I didn't get it wrong Tho posted my solution for someone else , thanks anyways
19. Any one know how to do Q11 C? Thank You!
20. Can you guys tell me the hardest core 1 paper in edexcel exam board I'm an aqa exam board student

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