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Slide9.JPG

  1. Chapter 10 Class 12 Vector Algebra
  2. Serial order wise

Transcript

Example 30 (Supplementary NCERT) Prove that [ 8( " + " & + & + )] = 2 [ , , ] To prove [ 8( " + " & + & + )] = 2 [ , , ] Solving LHS [ 8( " + " & + & + )] = ( " + " ). ["(" + ") " " (" + )] = ( " + " ). ["(" ") + (" )+"(" ") + (" )] = "(" + ")." [( ") + (" ) "+ 0 + (" " " ") " ] = . ( ) + .( ) + . ( ) + .( ) + .( ) + .( ) = [ ", " ", " ] + [ ", " ", " ] + [ ", " ", " ] + [ ", " ", " ] + [ ", " ", " ] + [ ", " ", " ] [ ", " ", " ] = [ ", " ", " ] = . ( ) As ( ) = 0 = . 0 = 0 Using Prop: [ ", " ", " ] = 0 [ ", " ", " ] = 0 [ ", " ", " ] = 0 [ ", " ", " ] = 0 = [ ", " ", " ] + 0 + 0 + 0 + 0 + [ ", " ", " ] = [ ", " ", " ] + [ ", " ", " ] = [ ", " ", " ] + [ ", " ", " ] = 2[ ", " ", " ] = R.H.S Hence proved

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.