Is it correct to write sqrt(sqrt(x)) as equation/formula ? or root4(x) ?
I mean if x = 10000 it will be 10
Is it correct to write sqrt(sqrt(x)) as equation/formula ? or root4(x) ?
I mean if x = 10000 it will be 10
It's not wrong to write $\sqrt{\sqrt{x}}$ in the same way that it's not wrong to write $\sqrt{\sqrt{\frac{2x^1}{2}}}$, but it's generally preferable to write expressions as simply as possible.
The phrase "square root" means the same thing as "one-half power". So,
$ \sqrt{\sqrt{x}} = \sqrt{x^{1/2}} = (x^{1/2})^{1/2} = x^{1/2 \cdot 1/2} = x^{1/4}. $
For the same reason as with square root, it would be appropriate to write either $x^{1/4}$ or $\sqrt[4] x$.