Question

Calculați valoarea expresiei
Ex 6. a și b


Va rog frumos

Answer 1

Răspuns:

Pct b)

a=0.5=$\frac{1}{2}$

$\frac{(\frac{1}{2})^{2} -4}{(\frac{1}{2})^{2} -3\frac{1}{2}+9} : \frac{\frac{1}{2} +2}{(\frac{1}{2}) ^{3} -27}$ =

$\frac{\frac{1}{4} -4}{\frac{1}{4} -\frac{3}{2} +9}$·$\frac{\frac{1}{8}-27}{\frac{1}{2}+2}$=

$\frac{\frac{1-16}{4}}{\frac{2-6+36}{4} }$·$\frac{\frac{1-216}{8} }{\frac{1+4}{2}}$=

$\frac{\frac{-15}{4}}{\frac{28}{4}}$·$\frac{\frac{-215}{8}}{\frac{5}{2} }$=

$\frac{15}{4}$·$\frac{4}{28}$·$\frac{215}{8}$·$\frac{2}{5}$=

$\frac{645}{112}$

Explicație pas cu pas: