Express each of the following as a rational number in the form
:
(i) 6-1
(ii) (-7)-1
(iii) 
(iv) 
(v) 
(i) 6-1
⇒ 6-1 = 
[Using 
-n = 
]
(ii) (-7)-1
⇒ (-7)-1 = 
[Using 
-n = 
]
(iii) 
⇒ 
= 4 [Using 
-n = 
]
(iv) 
⇒ 
= 
[Using 
-n = 
]
(v) 
⇒ 
= 
[Using 
-n = 
]
3