Search for: Sum to n terms of the series 131+13+231+3+13+23+331+3+5+…is Sum to n terms of the series 131+13+231+3+13+23+331+3+5+…is An24n2+9n+13Bn242n2+7n+15Cn242n2+9n+13Dn24n2+11n+11 Fill Out the Form for Expert Academic Guidance!l Grade ---Class 1Class 2Class 3Class 4Class 5Class 6Class 7Class 8Class 9Class 10Class 11Class 12 Target Exam JEENEETCBSE +91 Preferred time slot for the call ---9 am10 am11 am12 pm1 pm2 pm3 pm4 pm5 pm6 pm7 pm8pm9 pm10pm Please indicate your interest Live ClassesBooksTest SeriesSelf Learning Language ---EnglishHindiMarathiTamilTeluguMalayalam Are you a Sri Chaitanya student? NoYes Verify OTP Code (required) I agree to the terms and conditions and privacy policy. Solution:Let tr denote the rth term of the series, then tr=13+23+…+r31+3+…+(2r−1)=14r2(r+1)2r2 =14(r+1)2⇒ ∑r=1n tr=14∑r=1n (r+1)2=14∑r=1n+1 r2−1 =14(n+1)(n+2)(2n+3)6−1 =1242n3+9n2+13n+6−6 =n242n2+9n+13 Related content How to use NEET UG College Predictor 2024 to find your dream Medical College Is a Gap Certificate for NEET Repeaters Necessary? General Knowledge Questions With Answers on Islamic CBSE Class 10 Worksheets NEET Rank Predictor 2024: Calculate Your Rank by Marks Why to Choose Infinity Learn NEET Rank Predictor 2024 – The Most Accurate NEET Rank Predictor CBSE Class 10 Science MCQs CBSE Class 9 Science Structure of Atom MCQs Class 7 MCQs for All Subjects with Answers Raidas ke Pad Class 9