Question

What is the domain of the square root of the square root of x-1-1

Answer 1

\(\large \mathbb{ \sqrt{\sqrt{x-1} - 1} }\)

Answer 2

like that ?

Answer 3

Yes

Answer 4

the stuff inside sqrt has to be >= 0

Answer 5

so,

\(\large \mathbb{ \sqrt{x-1} - 1 \ge 0 }\)

Answer 6

solve x

Answer 7

x is \[x \ge 2\]

Answer 8

yes ! thats the domain

Answer 9

http://www.wolframalpha.com/input/?i=domain+sqrt%28sqrt%28x-1%29-1%29

Answer 10

^ur answer matches wid wolfram

Answer 11

does the zero thing usually work with equations like this?

Answer 12

yes, the assumption is that all functions are real funcitons

Answer 13

so, sqrt cannot be negative

Answer 14

ok