已知:<em>i</em>=3%/12=0.25%,<em>n</em>=5×12=60,<em>s</em>=0.5%,<em>A</em><sub>1</sub>=12000×50%=6000(元),<em>A</em><sub>2</sub>=1000元。<br />方法一:<br />(1)<em>F</em><sub>1</sub>=<em>P</em><sub>1</sub>(1+<em>i</em>)<em><sup>n</sup></em>=500000×(1+0.25%)<sup>60</sup>=580808.39(元);<br />(2)<em>F</em><sub>2</sub>=<em>P</em><sub>2</sub>(1+<em>i</em>)<em><sup>n</sup></em>=<em>A</em>/(<em>i</em>-<em>s</em>)<img width="10" height="21" src="http://admintk.100xuexi.com/UpLoadImage/2016-07-21/902b9ccc-00b3-498b-b14a-436307201685.png" />1-[(1+<em>s</em>)/(1+<em>i</em>)]<em><sup>n</sup></em><img width="7" height="21" src="http://admintk.100xuexi.com/UpLoadImage/2016-07-21/ffc54c9b-ce24-4daf-9406-124e5b058558.png" />(1+<em>i</em>)<sup>n</sup>=6000/(0.25%-0.5%)×<img width="10" height="21" src="http://admintk.100xuexi.com/UpLoadImage/2016-07-21/902b9ccc-00b3-498b-b14a-436307201685.png" />1-[(1+0.5%)/(1+0.25%)]<sup>60</sup><img width="7" height="21" src="http://admintk.100xuexi.com/UpLoadImage/2016-07-21/ffc54c9b-ce24-4daf-9406-124e5b058558.png" />×(1+0.25%)<sup>60</sup>=449360.09(元);<br />(3)<em>F</em><sub>3</sub>=<em>A</em><sub>2</sub>[(1+<em>i</em>)]<em><sup>n</sup></em>-1]/i或者<em>F</em><sub>3</sub>=<em>A</em><sub>2</sub>/<em>i</em>[1-1/(1+<em>i</em>)<em><sup>n</sup></em>](1+<em>i</em>)<em><sup>n</sup></em>=1000×[(1+0.25%)<sup>60</sup>-1]/0.25%=64646.71(元);<br />(4)<em>F</em>=<em>F</em><sub>1</sub>+<em>F</em><sub>2</sub>+<em>F</em><sub>3</sub>=580808.39+449360.09+64646.71=1094815.19(元);<br />(5)可购住房总价为:1094815.19/50%=2189630.38(元);<br />(6)可购住房单价为:2189630.38/120=18246.92(元/m<sup>2</sup>)。<br />方法二:<br />(1)<em>P</em><sub>1</sub>=50万元;<br />(2)<em>P</em><sub>2</sub>=<em>A</em><sub>1</sub>/(<em>i</em>-<em>s</em>)<img width="10" height="21" src="http://admintk.100xuexi.com/UpLoadImage/2016-07-21/902b9ccc-00b3-498b-b14a-436307201685.png" />1-[(1+<em>s</em>)/(1+<em>i</em>)]<em><sup>n</sup></em><img width="7" height="21" src="http://admintk.100xuexi.com/UpLoadImage/2016-07-21/ffc54c9b-ce24-4daf-9406-124e5b058558.png" />=6000/(0.25%-0.5%)×<img width="10" height="21" src="http://admintk.100xuexi.com/UpLoadImage/2016-07-21/902b9ccc-00b3-498b-b14a-436307201685.png" />1-[(1+0.5%)/(1+0.25%)]<sup>60</sup><img width="7" height="21" src="http://admintk.100xuexi.com/UpLoadImage/2016-07-21/ffc54c9b-ce24-4daf-9406-124e5b058558.png" />=386840.22(元);<br />(3)<em>P</em><sub>3</sub>=<em>A</em><sub>2</sub>/<em>i</em>[1-1/(1+<em>i</em>)<em><sup>n</sup></em>]=1000/0.25%×[1-1/(1+0.25%)<sup>60</sup>]=55652.36(元);<br />(4)<em>P</em>=<em>P</em><sub>1</sub>+<em>P</em><sub>2</sub>+<em>P</em><sub>3</sub>=(500000+386840.22+55652.36)元=942492.58(元);<br />(5)5年后的终值为:<em>F</em>=<em>P</em>(1+<em>i</em>)<em><sup>n</sup></em>=942492.58×(1+0.25%)<sup>60</sup>=1094815.20(元);<br />(6)可购住房总价为:1094815.20/50%=2189630.40(元);<br />(7)可购住房单价为:2189630.40/120=18246.92(元/m<sup>2</sup>)。