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 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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