1=power(1,2)

2+2=power(2,2)

3+3+3=power(3,2)

4+4+4+4=power(4,2) . . . . .

x+x+x+....(x times)=power(x,2)

Differentiating w.r.t. x

1+1+1+....(x times)=2*x

=> x=2*x

=> 1=2

What's the wrong ? Can you find it?

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## Comments

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TopNewestThis can help you.

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x+x+x......is x times which is variable........hence that differeantiating step is wrong

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There is "(\(x\) times)", which relies on \(x\) too, so you can't just go differentiate term by term on the left hand side. Or something similar. I've read this but cannot find it again.

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Why use division property of equality in the part (x = 2x) if you can isolate the x's instead...

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