Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 10 Answered

Sum of the first n terms of an AP is 3n^2/2 + 13n. Find the nth term of the AP.
Asked by manasvi.gopani | 18 Feb, 2018, 02:34: PM
answered-by-expert Expert Answer
begin mathsize 16px style straight S subscript straight n equals fraction numerator 3 straight n squared over denominator 2 plus 13 straight n end fraction
nth space term equals straight a plus open parentheses straight n minus 1 close parentheses straight d
straight a equals straight S subscript 1 equals fraction numerator 3 cross times 1 squared over denominator 2 plus 13 end fraction equals 3 over 15
straight a equals 1 fifth
straight S subscript 2 equals straight a plus straight a plus straight d.........1 st plus 2 nd space term
fraction numerator 3 cross times 2 squared over denominator 2 plus 13 cross times 2 end fraction equals 2 over 5 plus straight d
straight d equals 1 over 35
solve space
end style
Answered by Arun | 18 Feb, 2018, 04:24: PM
CBSE 10 - Maths
Asked by aditikaldate7 | 21 Apr, 2024, 03:16: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by rrajansinghakb199 | 08 Apr, 2024, 05:12: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by nagalaxmidurgarao937 | 08 Apr, 2024, 01:42: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by sonawnerohan01 | 23 Mar, 2024, 12:25: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by pathakvaishnavi9139 | 23 Mar, 2024, 10:45: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
Get Latest Study Material for Academic year 24-25 Click here
×