(2a3b)×(2a+3b) किसके बराबर?

  1. 0
  2. a×b
  3. 12(a×b)
  4. 4|a|29|b|2

Answer (Detailed Solution Below)

Option 3 : 12(a×b)
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Detailed Solution

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अवधारणा: 

a×a=0

a×b=b×a

गणना:

दिया गया है

=(2a3b)×(2a+3b)

=2a×2a+2a×3b3b×2a3b×3b

=0+2a×3b3b×2a0

=6(a×b)+6(a×b)

=12(a×b)

 

Additional Information

अदिश गुणनफल के गुण

a.a=|a|2

a.b=b.a (अदिश गुणनफल विनिमेय है)

a.0=0

a.(b+c)=a.b+a.c (जोड़ के ऊपर अदिश गुणनफल का वितरण)

पारस्परिक रूप से लंबवत सदिश के लिए ऑर्थोगोनल निर्देशांक के संदर्भ में, यह देखा जाता है कि i.i=j.j=k.k=1

सदिश गुणनफल के गुण

a×a=0

a×b=b×a (गैर-विनिमेय)

 a×(b+c)=a×b+a×c (जोड़ के ऊपर अदिश गुणनफल का वितरण)

i×i=j×j=k×k=0

i×j=k,j×k=i,k×i=j

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