若数列{an}是一个以d为公差的等差数列，bn=2an+3（n∈N*），则数列{bn}是

题干

若数列{a_n}是一个以d为公差的等差数列，b_n=2a_n+3（n∈N^*），则数列{b_n}是（）

A：公差为d的等差数列

B：公差为3d的等差数列

C：公差为2d的等差数列

D：公差为2d+3的等差数列

上一题下一题 0.0难度选择题更新时间:2012-08-21 07:20:38

C

End of Term Report
Student's name	Zhang Xing
Subject	English
Teacher	Mr. Dickens
At the beginning of this term	He found that studying English was very ____
In writing	His ____is better.
In speaking	He can have English ____with his friends and with me. He can answer my questions in English____.
Next term	If he ____like this, he will do much better.