cosz 3 3 Let f(z) and C is |z| = positively directed and C is ]z| = positively %3D %3D (z²–1)2 2' 2' directed. Then Sc f(z)dz= a) ni(sin 1 + cos 1) b) 0 c) -ni(sin 1 + cos 1) d) –2ni(sin 1 + cos 1) а. b. С. d. a.

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