In this section, we shall
learn about a new class of (related) functions called exponential functions and logarithmic
functions It needs to be emphasized that many statements made in this section are
motivational and precise proofs of these are well beyond the scope of this text The Fig 5 9 gives a sketch of y = f1(x) = x, y = f2(x) = x2, y = f3(x) = x3 and y = f4(x)
= x4