- #1

fluidistic

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[itex]2x=1 \Rightarrow \frac{d}{dx}(2x)=\frac{d}{dx}1 \Rightarrow 2=0[/itex]. Shamefully I do not see what's wrong with this reasoning!

Can someone help me? :)

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- Thread starter fluidistic
- Start date

- #1

fluidistic

Gold Member

- 3,767

- 134

[itex]2x=1 \Rightarrow \frac{d}{dx}(2x)=\frac{d}{dx}1 \Rightarrow 2=0[/itex]. Shamefully I do not see what's wrong with this reasoning!

Can someone help me? :)

- #2

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2x=1 is not an identity. It is only true for x = 1/2.

- #3

fluidistic

Gold Member

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- 134

Thank you LcKurtz, that makes sense.

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