1\
第ä¸å¹´å=-40
ä¹åæ¯å¹´æ«=30*0.75+36/5*0.25=24.3
5å¹´æ«å¤ç½®ç°éæµå¢å =4
å³ç°éæµä¸º=0å¹´ââ40 / 1å¹´-4å¹´ââ24.3 / 5å¹´ââ28.3
2\
æèµåç°å¼=-40+24.3*ï¼p/a,12%,5ï¼+4*(p/f,12%,5)=ï¼ å¤§äº0åæèµ
3\
第ä¸å¹´ææ§=36*0.4=14.4
第äºå¹´ææ§=8.64
第ä¸å¹´ææ§=5.184
第åå¹´ææ§=第äºå¹´ææ§=3.888
åå©æ¶¦=(80-50-该年ææ§)*ï¼1-25%ï¼
æèµåç°å¼=-40+(22.5+14.4)*(p/f,12%,1)+(22.5+8.64)*(p/f,12%,2)+(22.5+5.184)*(p/f,12%,3)+(22.5+3.888)*(p/f,12%,4)+(22.5+3.888+4)*(p/f,12%,5)=?
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