Maths唔識抵死題(QUICK!!!!!!!!!!!!!)

👨🏻‍🏫 學術台數學

Keiis

2010-11-28 5:25 am

圖片參考：http://imgcld.yimg.com/8/n/HA06682457/o/701011270143313873417070.jpg

__________________________________________________________

更新1:

EXPLAIN MORE !!!!!!!!! the log method

回答 (2)

用戶9112

2010-11-28 5:41 am

✔ 最佳答案

==================================================

圖片參考：http://img254.imageshack.us/img254/4965/64851481.png

2010-11-27 21:41:12 補充：
http://img254.imageshack.us/img254/4965/64851481.png

2010-11-28 12:13:17 補充：
(a) 4^x=256
xlog4=log256
x=log256/log 4=4

(b) 2^x=8
xlog2=log8
x=log8/log 2=3

👍 0 👎 0

Keiis

2010-11-28 8:07 pm

can u try to do these sums by using logarithm???

i know how to solve by using log but i can't get the answer.

do it and 2 marks will be added.!!!!!!!!!!!

2010-11-28 12:34:25 補充：
why?

4^x=256 ?????
2^x=8????

where is the 320 and 4^x-1?????
6*2^x-1????????????????????

can u show more workings for both a&b????
add 2 fun!!!!

👍 0 👎 0

收錄日期: 2021-04-23 23:22:59
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20101127000051KK01433

檢視 Wayback Machine 備份