观察按下列顺序排序的等式：9×0+1=1，9×1+2=11，9×2+3=21，9×3+4=31，…，猜想第n（n∈N*）个等式应为_刷题宝

题干

观察按下列顺序排序的等式：9×0+1=1，9×1+2=11，9×2+3=21，9×3+4=31，…，猜想第n（n∈N^*）个等式应为（　　）

A：9（n+1）+n=10n+9

B：9（n﹣1）+n=10n﹣9

C：9n+（n﹣1）=10n﹣1

D：9（n﹣1）+（n﹣1）=10n﹣10

上一题下一题 0.0难度选择题更新时间:2019-11-19 07:18:37

答案(点此获取答案解析）

B

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