Power
Definition of Power
Power or Exponent tells how many times a number is multiplied by itself.
More About Power
 Power is denoted by writing it above the head of its base.
 Anything raised to the power 0 is equal to 1, i.e. 2^{0} = 1, a^{0} = 1.
Video Examples: What is a Power?
Example of Power

In the above figure, the letter R is on the top.
 In 3^{5}, 5 is the power or exponent and 3 is the base.
 In a^{7}, 7 is the power or exponent and a is the base.
Solved Example on Power
Ques: Rewrite the expression 13 � 13 � 13 � 13 � 13 using power notation.
Choices:
A. 13^{5}B. 13^{4}
C. 51^{3}
D. 13^{1}
Correct Answer: A
Solution:

Step 1: 13 � 13 � 13 � 13 � 13 [Given expression.]
Step 2: Here, 13 is multiplied 5 times.
Step 3: So, 5 is the power of the base 13.
Step 4: We write it as 13^{5}.
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