Question

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Answer 1

Explicație pas cu pas:

a)

$b = - 0.(6) = - \frac{6}{9} {}^{(3} = - \frac{2}{3}$

$opusul \: lui \: b \: = - ( - \frac{2}{3} ) = \huge\boxed{\frac{2}{3} }$

b)

$a = \frac{2}{9} \\ inversul \: lui \: a \: = \frac{9}{2} = \boxed{ \huge{ 4.5}}$

c)

$ma = \frac{a + b}{2} \\ = \frac{ \frac{2}{9} - {}^{3)} \frac{2}{3} }{2} = \\ = \frac{ \frac{2}{9} - \frac{6}{9} }{2} = \frac{ - \frac{ 4}{9} }{2} = - \frac{ 4}{18} {}^{(2} = \huge \boxed{-\frac{2}{9} }$