2017_III_1_Pure

[CleanSlate]

[InstaMath]

Is anyone in a position to help me with the next bit of part ii? Have been stuck for a while

[AwesomeLife_Math]

I gotchu.

If n\ \geq 3 because otherwise we’ll have 0's and negatives.

[InstaMath]

Haha! Thank you - This bit specifically solved my issue!!

[AwesomeLife_Math]

No problem!
Now I’m trying the final result which I believe should be solvable with your previous results (but shifting the indices).

[InstaMath]

Awesome. Yes I’m going to see if I can get the next bit now as well

[AwesomeLife_Math]

(click for spoilers)(Lower Bound)

(Upper Bound)

[CleanSlate]

Honestly this is perfect. Exactly the reason I built this website

[InstaMath]

Here is my attempt. Thank you for hiding with spoilers as well

[CleanSlate]

Credit all round

[AwesomeLife_Math]

That looks wonderful @InstaMath!
And thank you for solving the first parts! (they help a lot at the end)