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Special series - 3

## Bharat Gupta is teaching live on Unacademy Plus

Bharat Gupta
Engineer by degree Mathematician by Heart. Having 22 years of teaching experience. Search me on Youtube for more videos.

U
Ya maam pls add more lessons
Dr Swasti Sinha
2 years ago
sure @hemaprakash I will be adding more lessons.. thank you
sir in 4:15 ,in 5th line of answer, why you took r in terms of n,it ahould be taken in terms of 'r'
1. SEQUENCE AND SERIES Class -16 (Miscellaneous Progression - 3)

2. SOME SPECIAL SEQUENCES 1. The sum of first n natural numbers 2. The sum of square of first n natural numbers I 2 6 3. The sum of cube of first n natural numbers 2

3. Find the sum of the series 1.n2. (n 1) +3.(n - 2) +...+ (n-1). 2+ n.1 n(n+2) (2n+1) a. h n(n+2)(n+-2) b. n(n+2) (2n+1) C. d n(n+2) (n+2) 6 3 Find the sum of 20 terms of the series 1.2.5+2.3.6+3.4.7 + a. 60240 b. 58280 c. 62370 d. 59290 Find the sum of 12 terms of the series, whose nth term is n3-3 a.-797160 b. -791076 c.-683760 d.-683060

4. Increase your percentile, push some more. Join the genus of 100%ile CAT PLUS COURSE Bharat Gupta Produces several 100%ilers in past years

5. Live classes Recorded Classes Discussion Forum CAT PLUS COURSE Batch-1 Revision Course on Quantitative Aptitude for CAT 2018 Batch 2 : Master Mensuration and Geometry for CAT 2018 V Facebook Group unacademy Practice Sheets Registration open till 30th Sep 18 Bharat Gupta Doubt clearing Visit: https://unacademy.com/plus

6. Find the sum of the series 1.n2. (n 1)3.(n 2) +.......+ (n 1). 2+n.1 n(n+2)(2n+1) 6 n(n+2)(n+2) 6 n(n+2) (2n+1) 3 n(n+2) (n+2) 3 a. b. C. d.

7. Find the sum of the series 1.n2. (n 1)3.(n 2) +.......+ (n 1). 2+n.1 n(n+2)(2n+1) 6 n(n+2)(n+2) 6 n(n+2) (2n+1) 3 d. +2)0+2) a. b. C. 3

8. Find the sum of the series 1.n2. (n 1)3.(n 2) +.......+ (n 1). 2+n.1 n(n+2)(2n+1) 6 n(n+2)(n+2) 6 n(n+2) (2n+1) 3 d. +2)0+2) a. b. C. 3

9. Find the sum of 20 terms of the series 1.2.52. 3. 63.4.7. a. 60240 b. 58280 c. 62370 d. 59290

10. Find the sum of 20 terms of the series 1.2.52. 3. 63.4.7. a. 60240 b. 58280 c. 62370 d. 59290 Sens-I Sen 3 2

11. Find the sum of 12 terms of the series, whose nth term is n3 3n a.-797160 b. -791076 c.-683760 d. -683060

12. < Back to Plus Revision Course on Quantitative Aptitude for CAT 2018 Bharat Gupta 9k followers I001 70academy YouTube 1st october to 6th November 2018 In this course, Bharat Sir, (20 years teaching experience) will conduct a Revision course covering the most important topics of Quants for CAT 2018 and explain topics with his unique shortcut trick and option elimination approach. Target audience comprises of primarily CAT 2018 and other MBA Exams aspirants. The course will be conducted in English and the notes and practice sheet will also be provided in English 24 hours of live classes Private Discussion Forum Doubt clearing sessions and Live quizzes 5,400 Includes 18% GST Apply for this Plus Course O Last date to apply is 30th Sept