John and Mary rceived some pocket money from their mother. The amount that John received was 60% of the amount that Mary received. If Mary got $80, find the total amount of the pocket money.
條式係咪咁計
$80x(1+60%)+$80
=$128+$80
=$208
仲有一條
The general term of a sequence of number is n over2(2n+1).Find the 25th term of the sequence .
咁係咪張25代入n度,,,個答案係637.5??
Form1 maths問題..
2008-06-06 3:43 am
回答 (2)
2008-06-06 4:47 am
✔ 最佳答案
第一條就 80x(60%)+80=128$
第二條跟你個問題就: n over2(2n+1)=(n/2)(2n+1)
=(25/2)(2x25+1)
=12.5(51)
=637.5
2008-06-06 3:59 am
第一條係$80x60%+$80=$48+$80=$128
第二條人係沒有可能有0.5但係我知你個答案一定係錯
第二條人係沒有可能有0.5但係我知你個答案一定係錯
收錄日期: 2021-04-13 15:39:26
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080605000051KK02079