swear the F1 papers are harder than the IAL FP1 papers??? had a 4+ mark difference between the 2 papers for jan 14
Careful now, some of those papers have content that isn't in your FP1 spec (just one teeny bit of content, but that might be what caused the mark drop). However, F1/FP1 papers are not inherently harder than one another, one may be harder iin a particular year as a coincidence, but it is not intended.
Careful now, some of those papers have content that isn't in your FP1 spec (just one teeny bit of content, but that might be what caused the mark drop). However, F1/FP1 papers are not inherently harder than one another, one may be harder iin a particular year as a coincidence, but it is not intended.
So the reason you are able to pull (2n+1) out of the sum expression is because you can think of it as a number and not a variable?
It's not a variable. You can't pull 'r' out because you're summing over r.
Basically, in a sum ∑r=0n you can pull out anything except terms that contain the letter that is at the bottom of the sum, so in this case, you can't pull out r, but you can pull out anything else.
If you had ∑k=0n you can pull out anything except k, etc...
It's not a variable. You can't pull 'r' out because you're summing over r.
Basically, in a sum ∑r=0n you can pull out anything except terms that contain the letter that is at the bottom of the sum, so in this case, you can't pull out r, but you can pull out anything else.
If you had ∑k=0n you can pull out anything except k, etc...