# Log

Calculate value of expression log |3 +7i +5i2| .

Result

x =  0.86

#### Solution:

$y = |3 +7i +5i^2| = \sqrt{ (3 -5)^2+7^2} = 7.28 \ \\ x = \log( y ) = \log( 7.28 ) = 0.86$

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