Question

Даю 25 баллов, решите пожалуйста номер 37,38

Answer 1

$1) \frac{x - y}{x + y} \times \frac{x + y}{x - y} = 1 \\ 2) \frac{x - y}{x + y} \div \frac{x - y}{x + y} = 1 \\ 3) \frac{x - y}{x + y} \div \frac{ y - x}{x + y} = \frac{x - y}{x + y} \times \frac{x + y}{y - x} = - 1 \\ 4) \frac{x - y}{x + y} \div \frac{1}{x + y } = \frac{x - y}{x + y} \times \frac{x + y}{1} = x - y$
$5) \frac{x - y}{x + y} \div \frac{x - y}{ {x + y}^{2} } = \frac{x - y}{x + y} \times \frac{ {x + y}^{2} }{x - y} = x + y$
$1) \frac{ {a}^{6} {b}^{8} }{ {c}^{6} } \times \frac{ {a}^{7} {c}^{5} }{ {b}^{5} } = \frac{ {a}^{13} {b}^{3} }{c}$
$2) \frac{ {a}^{10} {b}^{3} }{ {c}^{4} } \div \frac{ {a}^{11} }{3 {c}^{9} {b}^{6} } = \frac{ {a}^{10} {b}^{3} }{ {c}^{4} } \times \frac{3 {c}^{9} {b}^{6} }{ {a}^{11} } = \frac{3 {c}^{5} {b}^{9} }{a}$