Laws of Exponents

Exponents indicate repeated multiplication of a number by itself. There are Six Laws of Exponents in general and we have provided each scenario by considering enough examples. For instance, 5*5*5 can be expressed as 53. Here 3 indicates the number of times the number 5 is multiplied. Thus, power or exponent indicates how many times a number can be multiplied.

Usually, Exponents abide by certain rules and they are used to simplify expressions and are also called Laws. Let’s dive into the article and learn about the Exponent Laws in detail.

Exponent Rules with Examples

There are six laws of exponents and we have stated each of them by taking examples.

Product with Same Bases

In Multiplication of Exponents with Same bases then we need to add the Exponents. We can’t add the Exponents with unlike bases.

According to this law, for any non-zero term a, we have

am. an = am+n in which m, n are real numbers.

Example

Simplify 45.42?

Solution:

Given 45.42

= 44+2

= 46

Simplify (-2)3. (-2)1?

Solution:

Given (-2)3.(-2)1

= (-2)3+1

= (-2)4

Quotient with Same Bases

In the case of the division with the same bases, we need to subtract the Exponents. According to this rule am/an = am-n where a is a non zero integer and m, n are integers.

Example

Find the Value of 10-4/10-2?

Solution:

Given 10-4/10-2

= 10-4-(-2)

= 10-4+2

= 10-2

= 1/102

= 1/100

Power Raised to a Power

As per this law, if a is the base and then power raised to the power of base “a” gives the product of powers raised to base “a” such as

(am)n = amn where a is a non zero integer and m, n are integers.

Example

Express 164 as a power raised to base 2?

Solution:
We have 2*2*2*2 = 24

Therefore (24)4 = 216

Product to a Power

According to this rule, for two or more different bases and the same power then

an. bn = (ab)n where a is a non zero term and n is an integer.

Example

Simplify and Write the Exponential Form of 1/16*5-4?

Solution:

We can write 1/16 as 2-4

= 2-4*5-4

= (2*5)-4

= (10)-4

Quotient to a Power

According to this law, a fraction of two different bases having the same power is given as

an/bn = (a/b)n where a, b are non zero terms and n is an integer.

Example

Simplify the Expression and find the value as 123/43?

Solution:

Given Expression is 123/43

= (12/4)3

= (3)3

= 27

Zero Power

As per the rule, Any integer raised to the power of 0 is 1 such that a0 = 1 and a is a non-zero term.

Example

What is the value of 40 + 110 + 30 + 170 – 31?

Solution:

Given 40 + 110 + 30 + 170 – 31

Any number raised to the power 0 is 1.

= 1+1+1+1-3

= 4-3

= 1