Given the function (f + g) (x) as
![4x^2+x-7](https://img.qammunity.org/2023/formulas/mathematics/college/wgmne3qvzglfle81t0jfecjwyh4xqos2kz.png)
The domain of the function above is the set of x values except the for x- values that will make the function undefined
For the function above, the domain is defined at all set of real numbers and the interval notation is given as
[tex]-\infty
Hence, the correct option is B