Finf the largest domain of each of the following mappings

Question

Find the largest domain of each of the following mappings:

(a) f:x-->x² + 1

 

(b) f:x-->2+x/2-x

 

(c) g:x-->3x+2/x² -1

Answer 1

 

 

 

 

a)  D is all Real Numbers

 

b)  D does not equal 2 ; if 2 -X    

     is the denominator 

 

c)  D does not equal 1 or -1 ; if   

     X² - 1 is denominator