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 = quantity n times quantity six n squared minus three n minus one all divided by two

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I suggest writing out that second half of the equation in terms like the first. ...=n(6n^2-3n-1)/2

I know the statement for n=1 is true but I don't know how to find if k+1 is true

Just check the equation again using the next integer, which would be 2

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