MATHEMATICS · Multi-part · AP · AP Precalculus · Exponential and Logarithmic Functions · Exponential and Logarithmic Functions
Problem
Consider the exponential function f(x)=3(0.8)x.
(i) State the domain and range of f.
(ii) Determine whether f is increasing or decreasing. Give a reason for your answer based on the base of the exponent.
(iii) Without converting to decimals, decide which value is larger, f(−2) or f(1), and justify your conclusion briefly.