2=1


已知 a = b 則

a2 = ab
a2 - b2 = ab - b2
( a + b ) ( a - b ) = b ( a - b )
( a + b ) = b
a + a = a
2a = a
2 = 1


到底那邊有問題啊...........大家快來找出答案吧..
要不然幾千年的數學公式就不成立囉


Ñ 答案

H http://run.to/AndWhose

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