Question

f(x)=(2x)/(x-1) whats the domain

Answer 1

f(x)= 2x^2/(x^4+1)
In regards to 27c, d, e, and f.
c>> if f(x)=-1, what is x?
My understanding...
-1=2x^2/x^4+1
Cross-multiply to get:
-x^4-1 = 2x^2
Rearrange:
x^4 + 2x^2 + 1 = 0
Factor:
(x^2+1)(x^2+1) = 0
x = +i or x = -i

Answer 2

was that helpful?

Answer 3

domain is all real values except x=1