1.2.4 You wish to determine the GPA of students at your school. Describe what process you would go through to collect the sample if you use a stratified sample

Use mathematical induction to prove the statement is true for all positive integers n, or show why it is false. 1^2 + 4^2 + 7^2 + + (3n - 2)^2 = [n(6n^2-3n-1)/2]