By use of the Maclaurin series already obtained in this chapter, prove the identity e ix =

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By use of the Maclaurin series already obtained in this chapter, prove the identity eix = cos (x) + i sin (x).

a. Show that no Maclaurin series

f(x) = a0 + a1x + a2x2 +· · ·

can be formed to represent the function f(x) = √x. Why is this?

b. Find the first few coefficients of the Maclaurin series for the function

f(x) = √1 + x.

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