Final answer:
To write an exponential function using a calculator, one can use the ln (natural logarithm) or LOG (common logarithm) buttons. This allows expression of numbers as exponents, with the natural logarithm and exponential function being inverses of each other.
Step-by-step explanation:
To write an exponential function using a calculator, you can use logarithms. For instance, to obtain the natural logarithm of a number, you use the ln button on your calculator. To find a number from its natural logarithm, input the logarithm value into the calculator and calculate ex, where x is the natural logarithm of the number. When dealing with logarithms, remember they are exponents, and operations that involve them follow exponent rules.
To find the common logarithm, you would use the LOG button on the calculator. If you want to express a base number b as an exponential function, you could use the relationship where b = eln(b). For example, number 2 can be written as eln(2) due to the natural logarithm and the exponential function being inverses of each other.