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The vectors (a,a+1, a+2)(a+3, a+4, a+5)(a+6, a+7, a+8) are coplanar for |
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Answer» `AA a in R` `therefore |(a, a+1,a+2),(a+3, a+4, a+5), (a+6, a+7, a+8)|=0` On applying `C_(2) to C_(2) - C_(1) and C_(3) to C_(1)`, we get `|(a,1,2),(a+3,1,2),(a+6,1,2)|=0` HENCE, vectors are coplanar, `AA a in R`. |
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