Answer :
First blank:
144 × 2-3
We know by laws of exponents, a-n = 
⇒ 144 × 2-3 = 
= 
= 18
Second blank:
18 × 12-1
We know by laws of exponents, a-n = 
⇒ 18 × 12-1 = 
= 
Third blank: 
We know by laws of exponents, a-n = 
⇒ 
= 
= 
∴ 144 × 2-3 = 18; 18 × 12-1 = 
; 
= 
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