In the sequence shown, the terms are defined by $$a_{n}=(2n-3)^2$$ for all positive integers n. If the sum of the first k terms is 11, what is the value of k ?
In the sequence shown, the terms are defined by $$a_{n}=(2n-3)^2$$ for all positive integers n. If the sum of the first k terms is 11, what is the value of k ?