How do you find the domain of #y=(2x)/(-x-5)#?
1 Answer
Mar 9, 2017
Explanation:
The domain of a function is all real values that x can have without causing the function to be undefined.
Here y will be undefined if the denominator equals zero.
#rArr-x-5=0rArr-x=5rArrx=-5# Hence the domain is ALL real values of x except x ≠ -5
Which may be expressed in
#color(blue)"set builder notation"# as
#{x:x inRR,x!=-5}#
