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參謀ABC
發表於: Nov 15 2004, 11:13  
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神隱之主犯-永遠與須臾之罪人
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註冊日期: 9-18-2003

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QUOTE (•天地志狼• @ Nov 2 2004, 11:38 AM)
包包…
你是捉錯這題的意思了…
這條的意義在於"證明"出 1=2 這個怪道理
並不是弄到x沒有答案喔…

而究竟怎樣才可以反證沒有 1=2 這回事呢…?XD

這條早問過了吧,2x=x是因為x=0,不是2=1,未知數省略掉還有甚麼意義。
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A_U
發表於: Nov 15 2004, 11:54  
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QUOTE (•天地志狼• @ Nov 2 2004, 03:03 AM)
one more question...

as 3^2 = 3+3+3, 4^2=4+4+4+4
so

Assume x >= 0
x^2 = x+x+x+x+x+.....
2x = 1+1+1+1+1+1+.... (After derivative)

as 3=1+1+1, 4=1+1+1+1
so

2x = x (because there are x terms of 1)

2 = 1 ????????????

Try to disprove it =P

↓錯,一樣可以D的…難道你忘了Implicit Derivative?XD

↑x^2 = x+x+x+x+x+.....
=>x=0?

x^2 = x+x+x+x+x+.....(x terms on the right)
 is true only if x is a positive integer.
2^2=2+2
3^2=3+3+3
4^2=4+4+4+4
but
2.1^2≠2.1+2.1+"0.1 term of '2.1'"

It is not continuous, so you cannot take derivative of it on both sides.

撞撞先…
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參謀ABC
發表於: Nov 15 2004, 12:33  
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神隱之主犯-永遠與須臾之罪人
************

發表數: 3,458
所屬群組: 太守
註冊日期: 9-18-2003

活躍:15
聲望:1860


QUOTE (A_U @ Nov 15 2004, 07:54 PM)
QUOTE (•天地志狼• @ Nov 2 2004, 03:03 AM)
one more question...

as 3^2 = 3+3+3, 4^2=4+4+4+4
so

Assume x >= 0
x^2 = x+x+x+x+x+.....
2x = 1+1+1+1+1+1+.... (After derivative)

as 3=1+1+1, 4=1+1+1+1
so

2x = x  (because there are x terms of 1)

2 = 1 ????????????

Try to disprove it =P

↓錯,一樣可以D的…難道你忘了Implicit Derivative?XD

↑x^2 = x+x+x+x+x+.....
=>x=0?

x^2 = x+x+x+x+x+.....(x terms on the right)
 is true only if x is a positive integer.
2^2=2+2
3^2=3+3+3
4^2=4+4+4+4
but
2.1^2≠2.1+2.1+"0.1 term of '2.1'"

It is not continuous, so you cannot take derivative of it on both sides.

撞撞先…

2.1^2不等於2.1+2.1+2.1*0.1嗎?

最好再仔細算一算吧
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