题目3单选题
已知数列<img src="https://tihai-oss-cloud.itihey.com/img/f6e04388fb6831d8376c4da5308209c1.png">,<img src="https://tihai-oss-cloud.itihey.com/img/e8c755fa413f7f4846e135d563608fd9.png">,<img src="https://tihai-oss-cloud.itihey.com/img/dd09b5a8b6cd46d59618a32b74228cb9.png">,<img src="https://tihai-oss-cloud.itihey.com/img/820192a397a2225096f6b16ae4187f4d.png">,…下列各式不是它的通项的是( )A. an=<img src="https://tihai-oss-cloud.itihey.com/img/4f758851245281e652a835871836d19f.png">(n∈N*)B. an=<img src="https://tihai-oss-cloud.itihey.com/img/42c3c48790041f486e37cbadae489b21.png">(n∈N*)C. an=1-<img src="https://tihai-oss-cloud.itihey.com/img/4f758851245281e652a835871836d19f.png">(n∈N*)D. a1=<img src="https://tihai-oss-cloud.itihey.com/img/f6e04388fb6831d8376c4da5308209c1.png">,an=<img src="https://tihai-oss-cloud.itihey.com/img/4f758851245281e652a835871836d19f.png">(n≥2,n∈N*)