In order to solve any question involving exponents you must remember the 5 basic rules of exponents. Remember them? If not we will help you jog your memory:
Exponent Multiplication Rule:
 
Exponent Division Rule:
 
Raising power to power Rule:
 
Common Exponent Multiplication
 
Common Exponent Division

Exponent rules are useful for solving any test problem that involves power. Here is a quick example:
Example:
What is the value of if ?
A) 1
B) 2
C) 3
D) 4
E) 5
Solution:
Step 1: The bases on both sides are not equal. However we know that ,
Therefore
Step 2: Our equation can now be written as . Since the bases are equal, we can equate the exponents and solve the linear equation:
B is the correct answer.
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