Why is $\sqrt{x}$ a function?
10774
Why $f(x) = \sqrt{x}$ is a function?
96554
Why is $x^0 = 1$ except when $x = 0$?
68804
Writing your own square root function
3712
Why $\sqrt{-1 \cdot {-1}} \neq \sqrt{-1}^2$?
36664
How is the square root function implemented?
142845
is $y = \sqrt{x^2 + 1}− x$ a injective (one-to-one) function?
98271
Why does $(x \to a) ≠ (x = a)$ , But $f(x \to a) = f(x = a)$
27898
Difference between $\sqrt{x^2}$ and $(\sqrt{x})^2$
50041
Significance of $\sqrt[n]{a^n} $?!
7463
Square root of a square
14633
What's the thing with $\sqrt{-1} = i$
91380
Taylor series expansion for $f(x)=\sqrt{x}$ for $a=1$
157868
Is it wrong to say $ \sqrt{x} \times \sqrt{x} =\pm x,\forall x \in \mathbb{R}$?
133496
is $\sqrt{x}$ always positive?
58023
What is the purpose of a function being surjective?
33184
Something strange about $\sqrt{ 4+ \sqrt{ 4 + \sqrt{ 4-x}}}=x$ and its friends
141945
Why is $f(x) = \sqrt{x}$ is continuous at $x=0$? Does $\lim_{x \to 0^{-}} \sqrt{x}$ exist?