Question

Thu gọn

1)(-2).2⁸                      2)(1/2). (-1/2)⁶

3)(-2)².3²                     4)(-1/2)². (2/5)²

Answer 1

1: =-2⁹=-512

2: \(=\left(\dfrac{1}{2}\right)^7=\dfrac{1}{128}\)

3: \(=\left(-6\right)^2=36\)

4: \(=\left(-\dfrac{1}{2}\cdot\dfrac{2}{5}\right)^2=\dfrac{1}{25}\)

Answer 2

\(1,\left(-2\right).2^8=-2^9\)

\(2,\left(\dfrac{1}{2}\right).\left(-\dfrac{1}{2}\right)^6=\left(\dfrac{1}{2}\right)^7\)

\(3,\left(-2\right)^2.3^2=4.9=36\)

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

 

Answer 3

1) (-2).2⁸ = (-2).(-2)⁸ = (-2)⁹ = -512

2) (1/2).(-1/2)⁶ = (1/2).(1/2)⁶ = (1/2)⁷ = 1/128

3) (-2)².3² = 2².3² = (2.3)² = 6² = 36

4) (-1/2)².(2/5)² = (-1/2 . 2/5)² = (-1/5)² = 1/25