✔ 最佳答案
1.
考慮最初 2 年:
R = 9.5%
n = 2
P = $50000
2 年後的本利和 = P x (1 + R%)n
2 年後的本利和 = $50000 x (1 + 9.5%)2
考慮最後三年:
R = 8%
n = 3
P = $50000 x (1 + 9.5%)2
最後本利和 = P x (1 + R%)n
最後本利和 = $50000 x (1 + 9.5%)2 x (1 + 8%)3
最後本利和 = $50000 x (1.095)2 x (1.08)3
最後本利和 = $75521.3
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2.
(a)
R = 2
n = 2
P = 3 米
A = P x (1 + R%)n
A = (3 米) x (1 + 2%)2
A = (3 米) x (1.02)2
A = 3.12 米
答:2 年後樹高 = 3.12 米
(b)
R = 2
A = 3
n = 3
A = P x (1 + R%)n
3 = P x (1 + 2%)3
P = 3/(1.02)3
P = 2.83 米
答:3 年後樹高 = 2.83 米
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3.
P = $23400
R = 5
n = 73/365
單利息 = P x n x R%
單利息 = $23400 x (73/365) x 5%
單利息 = $234
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4.
(a)
每季利率 = (R/4)%
n = 2
P = $20000
20000 x [1 + (R/4)%]2 - 20000 = 1218
20000 x [1 + (R/4)%]2 = 21218
[1 + (R/4)%]2 = 1.0609
1 + (R/4)% = 1.03
(R/4)% = 0.03
R/4 = 3
R = 12
(b)
在第一年年底的本利和
= $20000 x [1 + (12/4)%]4
= $20000 x (1.03)4
= $22510.2
=
2008-10-12 16:40:47 補充:
2(b) 的答案應是 3 年前樹高。