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. 20 = 1, a0 = 1.

Video Examples: What is a Power?


Example of Power

    In the above figure, the letter R is on the top.
  • In 35, 5 is the power or exponent and 3 is the base.
  • In a7, 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. 135
    B. 134
    C. 513
    D. 131
    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 135.

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