No products in the cart.

  1. Homework Help
  2. CBSE
  3. Class 08
  4. Mathematics

Let the sum of n ,2n,3n …

CBSE, JEE, NEET, CUET

CBSE, JEE, NEET, CUET

Question Bank, Mock Tests, Exam Papers

NCERT Solutions, Sample Papers, Notes, Videos

Install Now
Let the sum of n ,2n,3n terms of an AP be S1,S2 and S3 show that S3 =3(S2-S1)?

    • Posted by Smitha Mohan 7 years, 2 months ago

    CBSE > Class 08 > Mathematics
    • 1 answers

    Abhishek Saini 7 years, 2 months ago

    Let a be the first term and d be the comman ratio. S1 = n/2[ 2a+(n-1)d ] S2 = 2n/2[ 2a+(3n-1)d ] S3 = 3n/2[ 2a+(3n-1)d ] Now, Right Hand Side (RHS) = 3( S2- S1) = 3 { 2n/2[2a+(2n-1)d] - n/2[2a+(n-1)d]} On solving this , we get = 3{ an + 3n²d/2 -nd/2 } = 3 { n [ a + ( 3n-1)d/2 ] } = 3n/2 [ 2a + ( 3n-1) ] = S3 .

    0Thank You

    ANSWER
    https://examin8.com Test

    Related Questions

    A streamer goes down stream from one point to another in 7 hours it covers the same distance upstream in 8 hours if the speed of the streamer is 2km/hr find the speed of the streamer in still water and the distance between the point

    • Posted by Yunus Malik 1 year, 4 months ago

    CBSE > Class 08 > Mathematics
    • 0 answers
    This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

    Few rules to keep homework help section safe, clean and informative.
    • Don't post personal information, mobile numbers and other details.
    • Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
    • Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
    • Ask specific question which are clear and concise.

    Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

    Posted by Monika 8B 5 months, 3 weeks ago

    CBSE > Class 08 > Mathematics
    • 0 answers
    3+4{

    • Posted by Gupteswari Bag 1 year, 4 months ago

    CBSE > Class 08 > Mathematics
    • 4 answers
    A rational number is such that when you multiply it by 5/2 and add2/3 to the product you get -7/12 find the number

    • Posted by Mohamed Imran 1 year, 4 months ago

    CBSE > Class 08 > Mathematics
    • 1 answers
    2x+5= 10

    • Posted by Arnav Tripathi 1 year, 5 months ago

    CBSE > Class 08 > Mathematics
    • 1 answers
    Pythagoras theoram ???

    • Posted by Ojus Dimen 1 year, 4 months ago

    CBSE > Class 08 > Mathematics
    • 1 answers
    Class 8th ex .5.1

    • Posted by Jashan Preet 8 months ago

    CBSE > Class 08 > Mathematics
    • 1 answers
    Find examples from your surroundings where lines insect set at right angle

    • Posted by Arya Jain 1 year, 4 months ago

    CBSE > Class 08 > Mathematics
    • 0 answers
    Convert the following ratio to percentage 3:4

    • Posted by Madhav Sharma 10 months, 1 week ago

    CBSE > Class 08 > Mathematics
    • 2 answers
    Find the measures of the angles made by the intersecting lines at the vertices of an equivalent triangle

    • Posted by Arya Jain 1 year, 4 months ago

    CBSE > Class 08 > Mathematics
    • 1 answers

    myCBSEguide App

    myCBSEguide

    Trusted by 1 Crore+ Students

    Install Now

    Test Generator

    Test Generator

    Create papers online. It's FREE.

    Try Now

    CUET Mock Tests

    CUET Mock Tests

    75,000+ questions to practice only on myCBSEguide app

    Install Now
    Google Play

    Download myCBSEguide App

    All Courses

    Other Websites

    CBSE Courses

    Resources

    Corporate

    NCERT Solutions

    CBSE Sample Papers

    All Content and Intellectual Property is under Copyright Protection | myCBSEguide.com ©2007-2025