Sequences & Series (id: 1b2f7d7e4)

本题目来源于试卷: Sequences & Series，类别为 IB数学

[填空题]
In a geometric sequence,gx7 hjzx2nq .3/61bj;c(sa7j9vioa lqyrfq+ cg -wqp9kn;2mw(lmdk4)u0ew $u_{2}=6, u_{5}=20.25$ .
1. Find the common ratio, r .   
2. Find $u_{1}$ .   
3. Find the greatest value of n such that $u_{n}<200$ .   

参考答案:
空格1: 1.5±2%  空格2: 4±2%  空格3: 10±2% 


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