- #1
chetzread
- 801
- 1
Homework Statement
in my notes , it's stated that the domain of ln(x+y) is x+y> 0 ...
Can i write it as x ≠ 0 , y ≠ 0 ? Or should i write it as (x,y) ≠ (0,0) ?(x,y) ≠ (0,0) represent x , and y can be 0 at the same time ?
Whereas x ≠ 0 , y ≠ 0 only represent x can't be equal to 0 ? for example, when x = 0 , y not = 0 , so , ln(x+y) is defined , when y = 0 , x not = 0 , so , ln(x+y) is defined .
Correct me if i am wrong ?