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5 votes
What is the domain for the function f(x) = 2^x-5.

2 Answers

7 votes

Answer:

X= All real Numbers

Explanation:

User Marc Karp
by
4.6k points
4 votes

Answer:

All real numbers

Explanation:

The domain is the set of x values that we can plug into the function and it will have a y value.

The domain is the "allowed" x values of a function.

Exponential functions of the form
y=a^x, where a is a constant have domain of "all real numbers".

The function in this problem is of this form with a "-5" at the end, which shifts the function vertically 5 units down. This doesn't affect x values (or domain)

Hence, the domain is the set of all real numbers.

User Abhishek Dave
by
5.0k points