How do you find the range from an undefined graph?

The function: f(x)= log(x^2 +6x +9)f(x)=log(x2+6x+9) has a point of (-33, undefined) in its graph. How do you find the range?

Is the domain {xeR}{xeR} ?

1 Answer
Feb 24, 2018

The domain of this function is D_f : x ∈R-{-3}Df:xR{3} The range of this function is R_f : f(x) ∈ (-∞,∞)Rf:f(x)(,)

Explanation:

We can see that the the function g(x)=(x^2 + 6x + 9 )g(x)=(x2+6x+9) attains all the values from (0,∞)(0,) which is the Domain for the outer logarithmic function, thus it attains all the values which are attained by the function f(x) = log_10xf(x)=log10x.

The Range of g(x)g(x) acts as the Domain of f(x)f(x).

:. R_f : f(x) ∈ (-∞,∞)

The graph of the function f(x) is given below :-

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