(a) Suppose z1, z2 € C and z satisfies the conditions Re(2) > 0 and Im(2) = 0. Show %3D then that Ln(z12) = Ln(z1) + Ln(22). (b) Consider following statement: Ln(-1+ i)" = n Ln(-1+i) holds for all n e N. Determine now whether the statement is true or not, by either proving it for all neN, or by exposing a value for n EN for which it is not true.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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(a) Suppose z1, 22 E C and z2 satisfies the conditions Re(z2) > 0 and Im(z2) = 0. Show
then that
Ln(z12) = Ln(z1) + Ln(2).
(b) Consider following statement:
Ln(-1+i)" = n Ln(-1+i) holds for all n e N.
Determine now whether the statement is true or not, by either proving it for all
ne N, or by exposing a value for n e N for which it is not true.
Transcribed Image Text:(a) Suppose z1, 22 E C and z2 satisfies the conditions Re(z2) > 0 and Im(z2) = 0. Show then that Ln(z12) = Ln(z1) + Ln(2). (b) Consider following statement: Ln(-1+i)" = n Ln(-1+i) holds for all n e N. Determine now whether the statement is true or not, by either proving it for all ne N, or by exposing a value for n e N for which it is not true.
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