Đáp án:
`1.` `D=``\emptyset`
`2.` `D=``{1}`
Giải thích các bước giải:
`1.`
`y=\frac{x-3sqrt(2-x)}{sqrt(x-2)}`
ĐKXĐ: `{(2-x>=0),(x-2>0):}<=>{(2>=x),(x>2):}`
TXĐ: `D=``\emptyset`
`2.`
`y=\frac{x.sqrt(1-x^2)}{sqrt(x-1)-sqrt(4-x)}`
ĐKXĐ: `{(1-x^2>=0),(x-1>=0),(4-x>=0),(sqrt(x-1)-sqrt(4-x)ne0):}<=>``{(-1<=x<=1),(x>=1),(4>=x),(sqrt(x-1)nesqrt(4-x)):}`
`<=>``{(-1leqxleq1),(1leqxleq4),(x-1ne4-x):}``<=>``{(-1leqxleq1),(1leqxleq4),(xne5/2):}`
`<=>x=1`
TXĐ: `D=``{1}`
