The exponential function y=bx is increasing if b>1 and decreasing if 0<b<1. Its domain is (−∞,∞) and its range is (0,∞). The logarithmic function y=logb(x) is the inverse of...The exponential function y=bx is increasing if b>1 and decreasing if 0<b<1. Its domain is (−∞,∞) and its range is (0,∞). The logarithmic function y=logb(x) is the inverse of y=bx. Its domain is (0,∞) and its range is (−∞,∞). The natural exponential function is y=ex and the natural logarithmic function is y=lnx=logex. Given an exponential function or logarithmic function in base a, we can make a change of base to convert this function to a
