907. Ҳисоб кунед: a) (1/2)-4; б) (-4)-3; в) 1,5-1; г) (-3/5)-2; д) -0,3-3; е) -(2 1/2)-2.

907. Ҳисоблаймиз:

1. a)

   \[ \left(\frac{1}{2}\right)^{-4} = 2^4 = 16 \]

2. б)

   \[ (-4)^{-3} = \frac{1}{(-4)^3} = \frac{1}{-64} = -\frac{1}{64} \]

3. в)

   \[ 1.5^{-1} = \frac{1}{1.5} = \frac{1}{3/2} = \frac{2}{3} \]

4. г)

   \[ \left(-\frac{3}{5}\right)^{-2} = \left(-\frac{5}{3}\right)^2 = \frac{25}{9} \]

5. д)

   \[ -0.3^{-3} = -\left(\frac{3}{10}\right)^{-3} = -\left(\frac{10}{3}\right)^3 = -\frac{1000}{27} \]

6. е)

   \[ -\left(2\frac{1}{2}\right)^{-2} = -\left(\frac{5}{2}\right)^{-2} = -\left(\frac{2}{5}\right)^2 = -\frac{4}{25} \]