13-1 18 0 1 2 3 4 2 2 2 2 0.8 0.6 0.4 0.2 2
2 13-1 8 0.8 2 2 2 2 0.6 0.4 0.2 0 1 2 3 4
13-2 18 0 1 2 3 4 0.8 0.8 0.8 0.8 8 3
3 13-2 8 0.8 0.8 0.8 0.8 8 0 1 2 3 4
13-3 8 0 1 2 3 4 A=8(A/p,10%,4)=2.524 4
4 13-3 8 0 1 2 3 4 A=8(A/p,10%,4)=2.524
13-4 ↑8 0 1 2 3 4 8(F/P,10%,4)=11.7128 5
5 13-4 8 8(F/P,10%,4)=11.7128 0 1 2 3 4
等差系列 A1+(n-2)G A+(n-1)G A+2G: A 4+G 0123 n-1 n (a) A1 Ar-G A-2G A1-(n-2)G A1-(n-1)G 0123 n-l n (b) 6
6 等差系列 A1+G A1+(n-2)G A1 0 1 2 3 n-1 n A1+(n-1)G A1+2G (a) A1 -(n-2)G A1 0 1 2 3 n-1 n A1 -(n-1)G A1 -G A1 -2G (b)