數學數學!!!!!!!

1.P^-2/P^-4
=P^4/P^2
=P^2

2)(5x^2)^2/(x^2)^3
=25x^4/x^6
=25/x^2
3)(y^2)/(z^4)^3
=y^2/z^12

小算盤有得計[^]
but要係小算盤個檢視度禁工程型
咁就有x^2,,x^3,,x^y個d制出現係左邊嫁啦

1)
p^-2
----------
p^-4

= p^﹝-2-(-4)﹞.....除號係 - ,所以指數係-2-(-4)
= p^-2+4
= p^2


2)
(5x^2)^2
------------
(x^2)^3
= 25x^4 / x^6
= 25x^(4-6) ....25係整數 ,同x既指數無關 <---要注意!
= 25x^-2 .....x既指數有負數一定要變分母 ,如果唔係答案就唔係化到最簡
= 25 /x^2

3)
y^2
--------
(z^4)^3
= y^2/z^12 ....有( )既指數就要乘