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3. what are the domains of the functions below 1 yx245xx2...

# Question: what are the domains of the functions below 1 yx245xx2...

###### Question details

What are the domains of the functions below:

1. $y=\sqrt{{x}^{2}-4}+\sqrt{5x-{x}^{2}}$

2. $y=\frac{\sqrt{{x}^{2}+1}}{\mathrm{ln}\left(x\right)+1}$

3. $y=3{x}^{2}-2x+6$

4. $y=\frac{\mathrm{ln}\left({x}^{4}+3\right)}{\left|{x}^{2}-2x\right|}$