数列1.3.6.10.15.21``````的通项公式怎么会是nˇ2+n?错了··数列1.3.6.10.15.21``````的通项公式怎么会是(nˇ2+n)/2?
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/22 05:14:02
![数列1.3.6.10.15.21``````的通项公式怎么会是nˇ2+n?错了··数列1.3.6.10.15.21``````的通项公式怎么会是(nˇ2+n)/2?](/uploads/image/z/376887-39-7.jpg?t=%E6%95%B0%E5%88%971.3.6.10.15.21%60%60%60%60%60%60%E7%9A%84%E9%80%9A%E9%A1%B9%E5%85%AC%E5%BC%8F%E6%80%8E%E4%B9%88%E4%BC%9A%E6%98%AFn%CB%872%2Bn%3F%E9%94%99%E4%BA%86%C2%B7%C2%B7%E6%95%B0%E5%88%971.3.6.10.15.21%60%60%60%60%60%60%E7%9A%84%E9%80%9A%E9%A1%B9%E5%85%AC%E5%BC%8F%E6%80%8E%E4%B9%88%E4%BC%9A%E6%98%AF%EF%BC%88n%CB%872%2Bn%EF%BC%89%2F2%3F)
数列1.3.6.10.15.21``````的通项公式怎么会是nˇ2+n?错了··数列1.3.6.10.15.21``````的通项公式怎么会是(nˇ2+n)/2?
数列1.3.6.10.15.21``````的通项公式怎么会是nˇ2+n?
错了··数列1.3.6.10.15.21``````的通项公式怎么会是(nˇ2+n)/2?
数列1.3.6.10.15.21``````的通项公式怎么会是nˇ2+n?错了··数列1.3.6.10.15.21``````的通项公式怎么会是(nˇ2+n)/2?
当然不是,是n(n+1)/2