What is the domain of #f(x)=(x^2+2x)/(x+1) #? Algebra Expressions, Equations, and Functions Domain and Range of a Function 1 Answer Sasha P. Sep 15, 2015 #D_f=(-oo,-1)uu(-1,+oo)# Explanation: Given function is defined when we can divide with #x+1# so: #x+1!=0# #x!=-1# #D_f=(-oo,-1)uu(-1,+oo)# Answer link Related questions How do you determine if (-1, 4), (2, 8), (-1, 5) is a function? What is the domain for #f(x)=2x-4#? What is the domain and range for (3,1), (1,-4), and (2, 8)? What is the domain and range of a linear function? Is domain the independent or dependent variable? How do you find the domain and range of a function in interval notation? How do you find domain and range of a rational function? How do you find domain and range of a quadratic function? How do you determine the domain and range of a function? What is Domain and Range of a Function? See all questions in Domain and Range of a Function Impact of this question 1462 views around the world You can reuse this answer Creative Commons License