1. Chapter 5 Class 11 Complex Numbers
  2. Serial order wise
  3. Ex 5.1

Ex 5.1, 4 - Chapter 5 Class 11 Complex Numbers

Last updated at May 29, 2018 by

Ex 5.1, 4 - Express in a + ib: 3(7 + i7) + i(7 + i 7) - Ex 5.1

  1. Chapter 5 Class 11 Complex Numbers
  2. Serial order wise

    3. Ex 5.1

    Ex 5.2 →

Transcript

Ex 5.1, 4 Express the given Complex number in the form a + ib: 3(7 + i7) + i(7 + i 7) 3 ( 7 + i 7 ) + i ( 7 + i 7) = 3 × 7 + i 7 × 3 + i × 7 + i × i 7 = 21 + 21 i + 7 i + i 2 7 putting i2 = −1 = 21 + 21 i + 7 i + ( −1 ) 7 = 21 + 21 i + 7 i − 7 = 21 – 7 + 21 i + 7 i = (21 – 7 ) + ( 21 i + 7 i ) = 14 + 28 i

Chapter 5 Class 11 Complex Numbers
Serial order wise

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Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.