Definition 3 The exponential function with positive base b > 1 is the function
y = f (x) = bx
The graph of y = 10x is given in the Fig 5 9 It is advised that the reader plots this graph for particular values of b like 2, 3 and 4 Following are some of the salient features of the exponential functions:
(1)
Domain of the exponential function is R, the set of all real numbers