log (㎡-1)-log(㎡-1)= -1(+10點)

2008-12-14 9:23 pm
請問這題的m 是什麼? 
log (㎡-1)-log(㎡-1)=-1

回答 (2)

2008-12-14 9:46 pm
✔ 最佳答案
log (㎡-1)-log(㎡-1)
=log((㎡-1)÷(㎡-1))
=log1

因為 -1 = -log10 ≠log1
所以是 Math Error, 即無答案

2008-12-14 20:09:04 補充:
Ans: no solution
2011-04-07 6:20 am
我反對這計法!
log(㎡-1)-log(㎡-1)=-1
log((㎡-1)÷(㎡-1))=-1
(㎡-1)÷(㎡-1)=0.1
㎡-1=0.1㎡-0.1
㎡-0.1㎡=1-0.1
0.9㎡=0.9
㎡=1
m=±√1
m=±1
m=+1或m=-1


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