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If the vectors `ahat(i)+hat(j)+hat(k), hat(i)+bhat(j)+hat(k), hat(i)+hat(j)+chat(k), (anebnec)` are coplanar, then `(1)/(1-a)+(1)/(1-b)+(1)/(1-c)=`

A

`1`

B

`-1`

C

`-2`

D

`5`

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The correct Answer is:
A
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  10. If the points A(-6, 3, 2), B(3, -2, 4), C(5, 7, 3), D(-13, lambda, -1)...

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  11. If the points A(3, 9, 4), B(0, -1, -1), C(lambda, 4, 4), D(4, 5, 1) ar...

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  12. If the points A(4, 5, 1), B(5, 3, 4), C(4, 1, 6), D(3, lambda, 3) are ...

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  13. If the points A(2, -1, 0), B(-3, lambda, 4), C(-1, -1, 4), D(0, -5, 2...

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  14. If the points A(2, -1, 1), B(4, 0, p), C(1, 1, 1), D(2, 4, 3) are copl...

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  15. If the origin and the points P(2, 3, 4), Q(1, 2, 3) and R(x,y, z) are ...

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  16. If the origin and the points A(1, 2, -2), B(1, -2, 3), C(x, y, z) are ...

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  18. The position vectors of the point A, B , C and D are 3hat(i)-2hat(j)-h...

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