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Surds are unresolved radicals, such as 

square root of 2 

cube root of 5 

These are examples of surds that are irrational numbers, since they cannot be expressed as ratios of integers. On the other hand, some surds are not irrational numbers, such as 

square root of 9 

cube root of 8 

since they can be expressed as the ratio of integers (in fact, these are exactly integers). 

There are also irrational numbers that cannot be expressed as surds. These are transcendental numbers. Examples are 

pi = 3.1415926535897932384.... 
e = 2.718281828...
 hope this time i help
1 5 1
in which class u r
What do u mean what class?
in wch grade or class like 10th 11th 9th etc
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