IB SL/HL - HOW TO: Arithmetic Sequence & Series (Difficult Level)

This video covers 6 difficult questions on Arithmetic Sequence & Series, using previous IB exam questions. *** I was made aware the last question's (c) and (d) are missing! A separate video outlining all of November 2014 SL Paper 2 Question 5 has been uploaded. Check it out here: https://youtu.be/M4-3r1NHHmg *** Timestamps: 00:00 November 2000 HL Paper 1 Question 7 02:10 November 2010 HL Paper 1 Question 5 04:34 May 2008 HL Paper 1 Question 3 05:58 November 2003 HL Paper 1 Question 9 08:10 May 2015 SL Paper 2 Question 3 10:55 November 2014 SL Paper 2 Question 5 IB Lesson 1.3 Need to cover the basics?: https://youtu.be/S1h5mpL3x0I Need an easier problem set?: https://youtu.be/6vz7YhCKteM