數學功課 最好有埋例色

2007-08-03 7:03 pm
志輝以年息9%向某銀行貸款$30000(複利計算,每季計息一次)。若他每三個月侯償還$8000,問剛滿半年後他尚久銀行若干?
A$16760
B$19643
C$15365
D$15185

回答 (3)

2007-08-03 7:34 pm
✔ 最佳答案
1. $30,000首季利息=$30,000x9%/4=$675元
2. 則他第一季共欠銀行$30,000+$675=$30,675
3. 第一季償還$8,000, 尚欠$30,675-$8,000=$22,675
4. 第二季利息=$22,675x9%/4=$510.19
5. 則他第二季共欠銀行$22,675+$510.19=$23,185.19
6. 第二季再償還$8,000, 尚欠$23,185.19-$8,000=$15,185.19

所以, 是D, 尚久銀行$15,185

2007-08-03 11:44:39 補充:
列式: [30000x(1+9%/4)-8000]x(1+9%/4)-8000=(30,675-8,000)X1.0225 - 8,000=22,675X1.0225-8,000=23,185.19-8,000=15,185.19
參考: ME
2007-08-03 7:24 pm
[30000x(1+2.25%)-8000]x(1+2.25%)-8000

=15185.1875

so D is the answer
2007-08-03 7:21 pm
B,因為計埋利息


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