If the vectors a i + j + k , i +b j + k and i + j +c k (a ≠ b ≠ c ≠ 1) are coplanar then…
Mathematics · JEE Advanced · NTA Exams — Three Dimensional Geometry
If the vectors \(a \hat{i}+\hat{j}+\hat{k},\) \(\hat{i}+b \hat{j}+\hat{k}\) and \(\hat{i}+\hat{j}+c \hat{k}\)
(a ≠ b ≠ c ≠ 1) are coplanar then the value of
\(\frac{1}{1-a}+\frac{1}{1-b}+\frac{1}{1-c}=\)
(a ≠ b ≠ c ≠ 1) are coplanar then the value of
\(\frac{1}{1-a}+\frac{1}{1-b}+\frac{1}{1-c}=\)
- 1
- –1
- 0
- none
Answer
(A) 1
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