Question: 3. It is known that .5 ex =1+x+ + , and sin x = x - 2! 3! + . , for any r E

3. It is known that .5 ex =1+x+ + , and sin x = x - 2! 3! + . , for any r E R. 3! 5! (a) [1 mark] Write the three terms of the series of e2x . (b) [2 marks] Calculate the first three terms of f(x) = e sina (in increasing powers of a)

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