Question

Write Y if the expression is a rational expression, if it is not, write N.


$1. \: \frac{4}{(x - 1)(x + 1)}$
$2. \: \frac{ \sqrt{y + 1} }{y^{2} - y - 2 }$
$3. \: 4y^{2} + 4y + 1 \div (y + ){}^{2}$
$4. \: \frac{c^{3} - c ^{ - 2}d + d {}^{3} }{c ^{4} - d ^{4} }$
$5. \: \frac{x ^{2} + y ^{2} }{y} + \frac{1}{x ^{3} } - \frac{2}{y {}^{3} }$
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Answer 1

Answer:

1. Y

2.N

3.Y

4.Y

5.Y

Step-by-step explanation: