3. You may use the power series expansion of the function e" = = 1+ + + 3! +..., where n! 1! 2! n=0 necessary in question 3. (a) Briefly explain the main difference between a Taylor series and a Maclaurin series of a function. (b) Evaluate the indefinite integral 1 dx as a power series. Give your answer using summation (sigma) notation.1 (c) Find the sum of the series i 8 3nn