Challenge problems
Challenge problems
5 marks
Tim Gan Math Original
Simplify \(\sum_{r=1}^{n}(2r+1)^3\).[5]
Solution:
Solution locked
680+ questions here come with free worked solutions. A free account saves your questions and progress; this one needs tuition enrolment.
Create a free account to practise similar questions.
Answer:\(n(2n^3+8n^2+11n+6)\)
Need help? Join our JC Math tuition classes.
Learn more