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If a=hati+hatj+hatk, b=2hati+lambda hati+lambdahatj+hatk, c=hati-hatj+4hatk and a.(bxxc)=10 then lambda is equal to |
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Answer» 6 Also, given `a.(bxxc)=10` `RIGHTARROW [{:(,1,1,1),(,2,lambda,1),(,1,-1,4):}]=10` `Rightarrow 1(4lambda+1-1(8-1)+1(-2-lambda)=10` `Rightarrow 4lambda+1-7-2-lambda=10` `Rightarrow 3lambda=18` `Rightarrow lambda=6` |
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