Introduction:
Irrational numbers are numbers that cannot be expressed as a fraction of two integers. To find three different irrational numbers between 5/7 and 9/11, we need to understand the concept of irrational numbers and how to find them.

What are Irrational Numbers?
An irrational number is a real number that cannot be expressed as a ratio of two integers. These numbers cannot be expressed in the form of a fraction. Irrational numbers are represented by non-repeating and non-terminating decimals.

Method to Find Irrational Numbers:
One way to find irrational numbers is by taking the square root of a non-perfect square. For example, the square root of 2 is an irrational number because it cannot be expressed as a fraction.

Three Irrational Numbers between 5/7 and 9/11:
To find three different irrational numbers between 5/7 and 9/11, we can use the following method:

1. First, we need to convert the fractions 5/7 and 9/11 into decimal form.

5/7 = 0.7142857
9/11 = 0.8181818

2. Next, we need to find irrational numbers that are greater than 0.7142857 and less than 0.8181818.

3. One way to do this is by taking the square root of non-perfect squares that lie between these two values. For example:

a. The square root of 2 is approximately 1.4142135. This number lies between 0.7142857 and 0.8181818 and is an irrational number.

b. The square root of 3 is approximately 1.7320508. This number also lies between 0.7142857 and 0.8181818 and is an irrational number.

c. The square root of 5 is approximately 2.2360679. This number also lies between 0.7142857 and 0.8181818 and is an irrational number.

Conclusion:
In conclusion, we can find three different irrational numbers between 5/7 and 9/11 by using the square root of non-perfect squares that lie between these two values. The square root of 2, 3, and 5 are three different irrational numbers that lie between 5/7 and 9/11.

Divide both the numbers till 7 to 8 decimal places
Then find the numbers between them they are your all irrational numbers