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阿女真勤力之問功課--攪掂--thanks to wawa70 [複製鏈接]

ZZdaphne

王國長老

積分: 30994

好媽媽勳章醒目開學勳章王國長老

1^#

發表於 11-2-3 22:47 |只看該作者 |倒序瀏覽 |打印

Amy deposits 80 000 in a bank,
the interest is compounded quarterly and an interest of 2 418 will be earned half a year
find the interest rate p.a.

ans: 6%

many thanks

攪拈,更正是2 418,
發現阿女擺烏龍

[ 本帖最後由 ZZdaphne 於 11-2-6 12:04 編輯 ]

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wawa70

男爵府

積分: 5150

2^#

發表於 11-2-4 10:43 |只看該作者

80000x(1+R%/4)2-80000=2418
(2 is square 二次方)

原帖由 ZZdaphne 於 11-2-3 22:47 發表
Amy deposits 80 000 in a bank,
the interest is compounded quarterly and an interest of 2 418 will be earned half a year
find the interest rate p.a.

ans: 6%

many thanks

攪拈,更正是2 418 ...