حاصل عبارت مقابل کدام است؟ $ A=(-۲)^۳ - (-۲)^۴ \times \frac{۱}{۳^۲} - (-\frac{۳}{۴})^۲ $
$ A=(-2)^3 - (-2)^4 \times \frac{1}{3^2} - (-\frac{3}{4})^2 = (-8) - [+16 \times \frac{1}{9}]-(\frac{16}{9}) = -8-(\frac{16}{9})-\frac{9}{16} \\ = -8 - \frac{16}{9} - \frac{9}{16} = -8 + \frac{-256-81}{144}=-8-2\frac{49}{144}=-10\frac{49}{144} $