Let z be a complex variable. For a counter-clockwise integration around a unit circle C, centred at origin, \(\mathop \oint \limits_C^\; \frac{1}{{5z - 4}}dz = A\pi i\). the value of A is
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Let z be a complex variable. For a counter-clockwise integration around a unit circle C, centred at origin, \(\mathop \oint \limits_C^\; \frac{1}{{5z - 4}}dz = A\pi i\). the value of A is