F.3指數定律

1. ...729

2.....8f^n

1. (-3^2)^3
=-3^(2 x 3)
=-3^6
=-729

2. 9f^n - f^n
=9 x f^n - f^n
=8f^n

1. (-3^2)^3
=[-(3x3)]^3
=(-9)^3
=(-9)(-9)(-9)
= -729

2. 9f^n - f^n
=8f^n
其實姐係當 f^n 係 x
咁咪 9x - x 姐係 8x