Question

M-a ajutați va rog! Ex 1

Answer 1

$x = \frac{5}{3}$

$y = \frac{2}{3}$

$a) {x}^{ - 1} = { (\frac{5}{3} )}^{ - 1} = \frac{1}{ \frac{5}{3} } = \frac{3}{5}$

$b)x + y = \frac{5}{3} + \frac{2}{3} = \frac{5 + 2}{ 3 } = \frac{7}{3}$

$c)y - x = \frac{2}{3} - \frac{5}{3} = \frac{2 - 5}{3} = \frac{ - 3}{3} = - \frac{3}{3} = - 1$

$d) {y}^{3} = { (\frac{2}{3}) }^{3} = \frac{ {2}^{3} }{ {3}^{3} } = \frac{8}{27}$

Answer 2

a) $x {}^{ - 1} = (\frac{5}{3}) {}^{ - 1} = ( \frac{3}{5} ) {}^{1} = \frac{3}{5}$

b) $x + y = \frac{5}{3} + \frac{2}{3} = \frac{7}{3}$

c) $y - x = \frac{2}{3} - \frac{5}{3} = - \frac{3}{3} = - 1$

d) $y {}^{3} = ( \frac{2}{3} ) {}^{3} = \frac{2 {}^{3} }{ 3{}^{3} } = \frac{8}{27}$

Sper ca te-am ajutat!