Question

1)(A4b5):(a2b2)3 при а=-0,5, b=2
2)(x7y4)3:(x10y5) при х =-3 y=2/3
3)(-2a6b3)3:(5a8b4)2 при a=7/8 b=-3/25

Answer 1

1) $frac{ {a}^{4} {b}^{5} }{ 3{a}^{2} {b}^{2} } = frac{ {a}^{2} {b}^{3} }{ {3} }$
При а = -0,5; b = 2:
$frac{ {( - 0.5)}^{2} {2}^{3} }{3} = frac{( - 0.25) times 8}{3} = frac{2}{3}$
2) $frac{ 3{x}^{7} {y}^{4} }{ {x}^{10} {y}^{5} } = frac{3}{ {x}^{3}y }$
При x = -3; y = $frac{2}{3}$:
$frac{3}{ {x}^{3}y } = frac{3}{ {( - 3)}^{3} times frac{2}{3} } = frac{3}{ - 27 times frac{2}{3} } = frac{9}{81 times 2} = frac{1}{18}$

Answer 2

Ответ:

сама не могу решить