Lesson 18 of 20 • 1 upvotes • 13:51mins
Learn how to convert th term of a series as diffeence of two terms to evaluate sum of series Method of Differences. Subtracting (2) from (1), we get, an = a1 + [(a2–a1) + (a3–a2)+…+(an–an–1)]. Since the terms within the brackets are either in an A.P. or a G.P., we can find the value of an, the nth term. We can now find the sum of the n terms of the sequence as S = Σnk=1 ak.
20 lessons • 4h 28m
Course overview
4:37mins
Sequences and Series
12:27mins
(AP) Arithmetic Progression
14:34mins
Sum and General Terms of AP
15:00mins
Arithmetic Mean or AM
15:00mins
(GP) Geometric Progression
14:41mins
Geometric Mean or GM
15:00mins
Harmonic Progression HP
13:37mins
AM GM HM Inequalty
14:14mins
Arithmetico Geometric Progression (AGP)
13:32mins
Selection of Terms in AP
13:01mins
Sum of Terms by General Term
12:01mins
Method of Difference to find General Term
12:09mins
Method of Difference to find Sum
12:54mins
Method of difference for general terms explanation
12:41mins
Questions asked in previous years in IIT JEE
15:00mins
PYQs ad expected questions for vectors
14:38mins
Sum by changing nth term
13:51mins
Important Questions at a glance
15:00mins
Rth differences of terms of Series ✔️
14:03mins