Hi guys, I am just doing a past paper for FP1 and have stumbled across this sort of question a few times and I am unable to answer it! Could you please give me a little bit of assistance as to what to do please?
Hi guys, I am just doing a past paper for FP1 and have stumbled across this sort of question a few times and I am unable to answer it! Could you please give me a little bit of assistance as to what to do please?
Thank you!
You'll need to use the result that you proved in the first part, so it'd be helpful if you could show us that.
Hi guys, I am just doing a past paper for FP1 and have stumbled across this sort of question a few times and I am unable to answer it! Could you please give me a little bit of assistance as to what to do please?
Thank you!
I got the answer to be 2213/29, could you check if this is right then I can explain my working if you would like
Oops, that's why I asked if it was right . I would assume an arithmetic error, as I split the problem up to 8 times the sum of r^3 from 5 to 8, minus 3 times the sum of r^2 from 5 to 8 plus K times the sum of r from 5 to 8
Oops, that's why I asked if it was right . I would assume an arithmetic error, as I split the problem up to 8 times the sum of r^3 from 5 to 8, minus 3 times the sum of r^2 from 5 to 8 plus K times the sum of r from 5 to 8
The sums are to 10 not 8. The correct answer is
Spoiler
The way you did it is good, but the first part of this question makes this part a trivial 2 liner or such instead of having to manually re-derive everything again.
The way you did it is good, but the first part of this question makes this part a trivial 2 liner or such instead of having to manually re-derive everything again.
Ah, I might need glasses, honestly thought it was an 8 . At least the method was correct so OP may follow that if they want.
Thank you mate. I will give this a go now and let you know how it goes! Thanks <3
No problem, this method of splitting sums from one number to another by writing them as sums from 1 to a number - sum from 1 to another number is in pretty much every FP1 paper ever.
No problem, this method of splitting sums from one number to another by writing them as sums from 1 to a number - sum from 1 to another number is in pretty much every FP1 paper ever.
yeah I can do the normal ones but when there's a constant involved it seems to throw me off a bit! thanks for the help!