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$$a_{1},a_{2},...,a_{n},...$$
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 ?
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以上解析由 考满分老师提供。
