Ex 5.1, 9 - Express in a + ib: (1/3 + 3i)3 - Complex numbers - Identities (square, cube of 2 complex numbers)

  1. Chapter 5 Class 11 Complex Numbers
  2. Serial order wise
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Ex5.1, 9 Express the given Complex number in the form a + ib: (1/3+3 )^3 (1/3+3 )^3 It is the form ( a + b )3 ( a + b )3 = a3 + b3 + 3ab ( a + b ) Putting a = 1/3 = 3 i = (1/3 )^3+( 3 )3+3 1/3 3 ( 1/3+3 ) = 1/27 + (3)^3 ( )^3 + 3 ( 1/3+3 ) = 1/27 + 27 ^3 + 3 ( 1/3+3 ) = 1/27 + 27 ^3 + 3 1/3+3 3 = 1/27 + 27 ^3+ + 9 2

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