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Let p(z) be the principal branch of 21-i. Let D* = C\(-00,0) be all the complex numbers except for the non-positive real numb
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solution : (1) Take HZ). 2-1 In(atu) - In (2:1) – In (x2-1) – 10 (2-1) 10 (912)) = (2-1) loz – 1n (2-1) By dit centiating the(2) 9 (1) = 1 (2-1) 10(90) = (2-2)[/01+0) * -In (63) +itan(112) =-love titan-1 (1/2) q (1) =é (lors pot-1) titan 1 (1/2) = 1(3) The cos(tan-(02)) +isio (tan- (12) V5 Since r is contained in gt, it follows from the fundamental theorem of calculus for

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