Question

4) If A+B+C =0 then Ä×B is
(1) C×B
(2) B×C
(3) Ā×C
(4) Zero​

Answer 1

4) zero

Solution

Griven

a+b+c=0

⇒a=−b−c...(i)

To prove

a×b=b×c=c×a

Proof:

a×b=(−b−c)×b=−c×b        [Using (i)]

b×c=−c×b

c×a=c×(−b−c)=−c