All i know is that the domain is ARN(all real numbers) for all of these.
Answer:
4 rth answer is correct if it is wrong plz comment
Step-by-step explanation:
=14-3/21
=11/21
=
2-1/6
1/6
4-3/12
1/12
Start with

We observe that both fractions are not defined if
. So, we will assume
.
We multiply both numerator and denominator of the first fraction by 3 and we sum the two fractions:

We multiply both sides by
:

We move everything to one side and solve the quadratic equation:

We check the solution:

which is true