Answer:
Only natural numbers (i.e., non-negative integers) can be the exponents of variables in a polynomial.
Step-by-step explanation:
The exponent of variables in a polynomial should be natural numbers ( ,
,  ,
,  ,
,  ,
,  .)
.)
 is equal to is equal to . In this expression, . In this expression, is the variable. Its exponent is is the variable. Its exponent is , which isn't a natural number. , which isn't a natural number.
- On the other hand,  is equivalent to is equivalent to . The exponent of variable . The exponent of variable is is , which is indeed a natural number. , which is indeed a natural number.
 isn't a polynomial because the exponent of variable
 isn't a polynomial because the exponent of variable  isn't a natural number. On the other hand,
 isn't a natural number. On the other hand,  is indeed a polynomial over the set of real numbers.
 is indeed a polynomial over the set of real numbers.
 
        
             
        
        
        
#1 is similar to write it out it’s triangle FHG ~ triangle KJL #2 is also but #3 and #4 aren’t
        
             
        
        
        
3,000,000,000,000+600,000,000+30,000,000+200,000+90,000+50+8