TrueFalse If false give a counter example A All sub rings of
 True/False: If false, give a counter example. 
 
 
 A). All sub rings of a field F are subfields of F.
 B). If f(x) is irreducible over a field F, and k€ F -{0}, then the polynomial kf(x) is irreducible over F.
  True/False: If false, give a counter example. 
 
 
 A). All sub rings of a field F are subfields of F.
 B). If f(x) is irreducible over a field F, and k€ F -{0}, then the polynomial kf(x) is irreducible over F.
 A). All sub rings of a field F are subfields of F.
 B). If f(x) is irreducible over a field F, and k€ F -{0}, then the polynomial kf(x) is irreducible over F.
Solution
A) true
B) true

