by definition, an exponential function with base c is defined by <span>h (x) = ac^x</span><span> where a ≠0, c > 0 , b ≠1, and x is any real number.</span> The base, c, is a constant and the exponent, x<span>, is a variable. </span>so if we have f(x)=3(3\8)^2x, this equivalent to f(x)=3(3\8)^y(x), where y (x)=2x, <span> therefore, the base is 3/8, and the variable is the function </span>y (x)=2x,
