JEE Main 2026 Mathematics question
The sum upto 10 terms is equal to:
Answer: (C)
Solution
The nth term is (1/n)·n(n+1)(2n+1)/6=(n+1)(2n+1)/6=(2n²+3n+1)/6. Summing n=1 to 10: [2(385)+3(55)+10]/6=945/6=315/2.
The sum upto 10 terms is equal to:
The nth term is (1/n)·n(n+1)(2n+1)/6=(n+1)(2n+1)/6=(2n²+3n+1)/6. Summing n=1 to 10: [2(385)+3(55)+10]/6=945/6=315/2.