Final answer:
The value of the series is 2n^2.
Step-by-step explanation:
The given series is infinity n 4 n^2 n = 1.
To find the value of the series, we can observe that the expression in the box is equal to n^2. By rearranging and grouping terms, we can rewrite the series as:
2[n + 3 + ....+(2n − 3)+n]
Now, we can simplify the expression to:
2n^2
Therefore, the value of the series is 2n^2.