Math (precalculus)
posted by Angellove on .
Hey! I have a domain and range question! I don't remember how to get these, can you help? How do you calculate the domain and range of these?
What's the domain and range of each?
a. f(x)= 1/x=3
b. g(x)= [square root of] (x+6)
c. h(x)= x^3+2x+5
Thanks for help!:)

a) Don't you mean 1/(x3) ?
b. The domain is all numbers greater than or equal to 6, since you cannot take a suare root of a negative numbers.
The range is 0 and all positive numbers.
c. x and h(x) can be any real number, positive or negative 
Thanks!:)

f(x) = x24