Question

aflati valoarea expresiei.
va rog mult ​

Answer 1

$a)( 6,75 - 4,5 \cdot 1 \frac { 2 } { 3 } ) \cdot ( - 1 \frac { 1 } { 3 } ) ^ { 3 }$

$\left(6.75-4.5\times \left(\frac{3+2}{3}\right)\right)\left(-\frac{1\times 3+1}{3}\right)^{3}$

$\left(6.75-4.5\times \left(\frac{5}{3}\right)\right)\left(-\frac{1\times 3+1}{3}\right)^{3}$

$\left(6.75-\frac{15}{2}\right)\left(-\frac{1\times 3+1}{3}\right)^{3}$

$-\frac{3}{4}\left(-\frac{3+1}{3}\right)^{3}$

$-\frac{3}{4}\left(-\frac{4}{3}\right)^{3}$

$-\frac{3}{4}\left(-\frac{64}{27}\right)$

$raspuns = > \frac{16}{9}$

$b)( - \frac { 5 } { 12 } - \frac { 13 } { 20 } ) ^ { 2 } \cdot ( - 1 \frac { 13 } { 32 } )$

$\left(-\frac{16}{15}\right)^{2}\left(-\frac{1\times 32+13}{32}\right)$

$\frac{256}{225}\left(-\frac{1\times 32+13}{32}\right)$

$\frac{256}{225}\left(-\frac{32+13}{32}\right)$

$\frac{256}{225}\left(-\frac{45}{32}\right)$

$raspuns = > -\frac{8}{5}=-1.6$

$c)( - \frac { 11 } { 18 } + ( - 2 \frac { 2 } { 9 } ) \cdot ( - 0,2 ) ) ^ { 3 } \cdot ( - 1,2 )$

$\left(-\frac{11}{18}+\left(-\frac{18+2}{9}\right)\left(-0.2\right)\right)^{3}\left(-1.2\right)$

$\left(-\frac{11}{18}-\frac{20}{9}\left(-0.2\right)\right)^{3}\left(-1.2\right)$

$\left(-\frac{11}{18}+\frac{4}{9}\right)^{3}\left(-1.2\right)$

$\left(-\frac{1}{6}\right)^{3}\left(-1.2\right)$

$-\frac{1}{216}\left(-1.2\right)$

$raspuns = > \frac{1}{180}$

Sper ca ti-am fost de folos. Succes!!!