Could you please help me by answering this question elaborately.....
Adhi Narayana Prabhu Dev , 4 Years ago
Grade 12
Vectors> Could you please help me by answering thi...
2 Answers
Arun
Last Activity: 4 Years ago
Dear student
it is (a.b + a.c ) x (a + 2b + 3c)
= (a.b) x a + (a.b) x 2b + (a.b) x 3c + (a.c) x a + (a.c) x 2b + (a.c) x 3c
= 0 + 0 + 3 [ a b c] + 0 – 2 [ a b c] + 0
= [ a b c]
Hope it helps
Vikas TU
Last Activity: 4 Years ago
Dear student
a.{ b× a + 2 b×b + 3 b×c + c×a + 2c×b + 3 c×c)
a.{ b×a + 3 b×c + c× a - 2 b×c )
a. ( b× a + c× a + b× c)
a.( b×a) + a.( c×a) + a.( b×c)
As a.( b×a) and a.( c×a) =0
So a .( b×c) = [ a b c]
Good Luck
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