Question

http://prntscr.com/2z1nqd

Answer 1

\[\frac{ \sqrt{x+4} }{ \sqrt{1-x} }\]

Answer 2

first it to be valid denominator should not be zero

Answer 3

2nd value inside root should be greater than or equal to zero

Answer 4

\[denominator \neq 0 \]
implies \[1-x \neq0\]

Answer 5

\[x \neq1\]

Answer 6

\(\large{1-x>0}\)

I would have said this.

Answer 7

second
1-x>0
1>x
and also 4+x>=0
x>=-4
take common part

Answer 8

[-4,1)

Answer 9

i think it would be C.

Answer 10

@g17

Answer 11

yeah captcha