Question

Il puteti calcula pe a va rog ?

Answer 1

$\displaystyle a=3,5:(-0,5)^{-4}=3,5:\frac{1}{(-0,5)^4} =\frac{35}{10} :\frac{1}{\Bigg(-\cfrac{5}{10} \Bigg)^4} =\frac{35}{10} :\frac{1}{\Bigg(-\cfrac{1}{2} \Bigg)^4} =\\\\=\frac{35}{10} :\frac{1}{\cfrac{1^4}{2^4} } =\frac{35}{10} :\frac{1}{\cfrac{1}{16} }=\frac{35}{10} \cdot \frac{1}{16} =\frac{35}{160} =\frac{7}{32}$