Log negative one zero
Theorem： log（-1） = 0
Proof：
a. log = 2 * log（-1）
On the other hand：
b. log = log（1） = 0
Combining a） and b） gives：
2* log（-1） = 0
Divide both sides by 2：
log（-1） = 0
幽默 笑話本文地址：http://www.autochemexpert.com/writing/humor/73765.html
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