The following sum is 1+1-2+3-4+5-6........-20=?

#Mathematics

1909 Views

The following sum is 1+1-2+3-4+5-6........-20=?

muskan singh 25th Nov, 2018

Answer

Answer Later

Report

Answers (3)

Kishor Biradar 10th Feb, 2020

1+1-2+3-4+5-6+7-8+9-10+11-12+13-14+15-16+17-18+19-20= -9

Like Share

harsh Student Expert 2nd Dec, 2018

1 +

1+3+5+7+9+11+13+15+17+19

-2-4-6-8-10-12-14+16-18-20

=-9

Like Share

Vikas gehlot 26th Nov, 2018

I think this is a Very simple question of Sequence and Series. The sum You can easily find out By making a combination of Two terms Together then all will be reduced to only -1. There will be Total ten -1 which means the sum will be -9, It is a very trivial question.

Like Share

Related Questions

S=1 - 1/4 + 1/6 - 1/9 + 1/11 - 1/14..........infinity. Find the sum of series

586 Views

Solved The rank of the matrix A = [ 4 4 0 3 -2 3 -1 5 1 4 8 7 1 1 1 1 ]

2066 Views

best book for btech 1st year student 1)mathematics 2)physics 3)c programming 4)engineering drawing 5)communication skill

4176 Views

find the coordinates of the point whose distance from (3 5) is 5 units and from (0 1) is 10 units

3198 Views

I am New Student of Class XI in WBCHSE Board and My Subject is 1. Bengali & 2. English (Compulsary) 3. Mathematics, 4. Chemistry, 5. Biology, 6. Geography. So Now I am want to that After HS Pass with this 6 Subjects then I am eligible What BSc Honours Courses in Graduation ? (e.g.:- Botany Hons.)

100 Views

Applications for Admissions are open.

Chanakya University B.sc Admi...

Apply

Scholarships Available

Amity University | B.Sc Admis...

Apply

Ranked amongst top 3% universities globally (QS Rankings)

Woxsen University B.Sc. Admis...

Apply

Build Your Own Degree - Choose any 3 out of 8 Electives | 100% Plcament track | 100+ Global Partners | 200+ Industry Interactions

Symbiosis School for Liberal ...

Apply

Admissions open for BA/BSc. Liberal Arts (Honours) & BA / BSc. Liberal Arts (Honors) with Research

UPES B.Sc Admissions 2025

Apply

Ranked #46 amongst Universities in India by NIRF | Ranked #1 in Academic Reputation in India by QS World University Rankings

KL University B.Sc Admissions...

Apply

A++ Grade by NAAC | Recognized as Category-1 University by UGC | 100% Placement, 60 LPA Highest CTC, 400+ Recruiters

View All Application Forms

Trending Articles/News

Download the Careers360 App on your Android phone

Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile

150M+ Students

30,000+ Colleges

500+ Exams

1500+ E-books