Show that f'() and f(2) exists everywhere at any point: and find f'(2) and f() if...

 

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Show that f'() and f"(2) exists everywhere at any point: and find f'(2) and f"() if (a) f (z) = iz +2, (b) f(z)= a*, (c) f(z)=cosr coshy isin 2 sinh y. Show that f'() and f"(2) exists everywhere at any point: and find f'(2) and f"() if (a) f (z) = iz +2, (b) f(z)= a*, (c) f(z)=cosr coshy isin 2 sinh y.