please show all work to help me better understand.

Let f(I) = + +. 3 Use the limit definition of the derivative to find () f'( - 6) = () f' ( - 4) = (in) f' ( - 2) = (iv) f' (0) = To avoid calculating four separate limits, I suggest that you evaluate the derivative at the point when I = a. Once you have the derivative, you can just plug in those four values for "a" to get the answers