JEE Main & Advanced
Mathematics
Sequence & Series
Question Bank
Numerical Value Type Questions - Sequences and Series
question_answer
The sum of the following series \[1+6+\frac{9({{1}^{2}}+{{2}^{2}}+{{3}^{2}})}{7}+\frac{12({{1}^{2}}+{{2}^{2}}+{{3}^{2}}+{{4}^{2}})}{9}\] \[+\frac{15({{1}^{2}}+{{2}^{2}}+....+{{5}^{2}})}{11}+....\] up to 15 terms, is: