Suppose that f is a function given as f(x)=-3x7. We will compute the derivative of f at x=4 as follows.First, we will compute and simplify the expression f(4h).f(4h)=Then we compute and simplify the difference quotient between x=4 and x=4h.f(4h)-f(4)h=The derivative of the function at x=4 is the limit of the difference quotient as h approaches zero.f'(4)=limh0f(4h)-f(4)h=