Where is the problem here:$-1=(-1)^1=(-1)^\frac{2}{2}=({(-1)}^{2})^{1/2}=\sqrt{1}=1$?
3712
Why $\sqrt{-1 \cdot {-1}} \neq \sqrt{-1}^2$?
27132
Can't figure out how $\sin\left(\tan^{-1}(x)\right)=\frac{x}{\sqrt {x^2+1}}$
6482
Why aren't the functions $f(x) = \frac{x-1}{x-1}$ and $f(x) = 1$ the same?
140086
Does $3-4+1$ equal $0$ or $-2$.. or maybe $2$?
13899
Proof that $-v = (-1)*v$
154945
$|px^2+qx+r|\le1$ for all $x$ in $[-1; 1]$, show that $|rx^2+qx+p|\le2$ for all $x$ in $[-1; 1]$
43834
Simple Complex Number Problem: $1 = -1$
62161
Solutions of the Pell-type equation $x^2-2y^2=-1$
39908
Finding the error in this proof that 1=2
70660
Why is $\sqrt{8}/2$ equal to $\sqrt{2}$?
154001
$(g\circ f)^{-1}=f^{-1}\circ g^{-1}$
54030
Square and square root and negative numbers
25518
How can I solve the equation $x^3-x-1 = 0$?
68746
What is $f(f^{-1}(A))$?
158335
Why is this $0 = 1$ proof wrong?
64941
Why is $1 - \frac{1}{1 - \frac{1}{1 - \ldots}}$ not real?
8642
Calculate $ \int_{-2}^{0} \frac{x}{\sqrt{e^x+(x+2)^2}} dx $