IB MAI HL Functions Topic 2.2 Applications of Functions (id: c2b19ec30)

本题目来源于试卷: IB MAI HL Functions Topic 2.2 Applications of Functions，类别为 IB数学

[填空题]
Sarah's investment portfolio, V(t), in Austral96+bnlc bmq7n ian dollars (z7n g1cd96g kyAUD), is modelled by the fuk d9ngz7g61ycnction
V(t)=64000$\times$(1+$\frac{k}{1000}$)$^t$,t≥0,where t is the number of years since 2019 and k is a constant.
1.Find an expression for the value of the investment portfolio in 2020. Give your answer in the form a+bk, where a,b∈$Z^+$.
Three years later, in 20222022, the value of the investment portfolio is expected to be 74088 AUD.
2.Find the value of k. k =   
This model is defined for 0≤t≤n. At n years, the value of the investment portfolio would have doubled since 20192019.
3.Find the value of n. n ≈    years

参考答案:
空格1: 5±2%  空格2: 14.2±2% 


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