How do you find the domain and range of f(x)=x2+8x+6?

1 Answer
Aritra G.
Sep 2, 2017

The domain is the set if that values of x for which the function f(x) is defined.

On the other hand, the range is the set into which the function f maps the domain to.

Unless otherwise specified, we consider these to be real valued function and therefore, the range is R, the set of real numbers.

Also, one readily observes the function is defined for all real values of x. Also, for any real value of x,
the value of f is real and hence, the domain is the set of reals R.

The function f maps R into R by a specific rule specified by the functional form,

f(x)=x2+8x+6

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