Consider the function f(z)=(2z+1)(z2−1). (a) What can be said about the continuity and differentiability of f at z=−1+2i?

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Consider the function f(z)=(2z+1)(z2−1).

(a) What can be said about the continuity and differentiability of f at z=−1+2i?
 
 
(b) If
lim f (2) = x + iy
z→-1+2i
then what is the value of x – 9
Transcribed Image Text:(b) If lim f (2) = x + iy z→-1+2i then what is the value of x – 9
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