Question

What is the domain of the exponential function \[y=b^x\]?

Options

• All real numbers \[\mathbb{R}\]

• All positive real numbers including \[0\]

• All negative real numbers

• Strictly positive real numbers \[\mathbb{R}^+\]

Answer 1

The exponent \[x\] in \[y=b^x\] may be any real number. Therefore, the domain of an exponential function is \[\mathbb{R}\].