Answer:
11n + 19
Step-by-step explanation:
The parentheses can be removed immediately without affecting the clarity of this expression:
4n + 13 + 6 + 7n
Next we combine like terms, obtaining:
11n + 19
Basically, take the union of both domains
g(x)=x/(1-x)
1-x=0
1=x
x=1 is restricted because it makes you divide by 0
f(x)=(1-x)/(1+x)
1+x=0
x=-1
x=-1 is restricted because it makes you divide by 0
domain is all real numbers except -1 and 1