數學!!!!!!!!!!! help

man ying

2008-01-27 11:18 pm

若 x＞ｙ＞o，則 log(x²-y²)=

回答 (1)

STEVIE-G™

2008-01-27 11:24 pm

✔ 最佳答案

log(x²-y²)=
=log[(x-y)(x+y)]
=log(x-y)+log(x+y)

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