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If 2bar(i)+3bar(j)+5bar(k), 2bar(i)+4bar...

If `2bar(i)+3bar(j)+5bar(k), 2bar(i)+4bar(j)+5bar(k) and 2bar(i)+4bar(j)+7bar(k)` are the vertices of `DeltaABC`, then its circum-centre is

A

`2bar(i)+7bar(j)+6bar(k)`

B

`2bar(i)+7/2bar(j)+6bar(k)`

C

`2bar(i)+bar(j)+3/2bar(k)`

D

`2bar(i)+1/2bar(j)+bar(k)`

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-PROPERTIES OF VECTORS-PRACTICE EXERCISES
  1. The ratio in which 3bar(i)+4bar(j)+7bar(k) divides the join of bar(i)+...

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  2. In a DeltaOAB, E is the mid point of OB and D is a point in AB such th...

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  3. If 2bar(i)+3bar(j)+5bar(k), 2bar(i)+4bar(j)+5bar(k) and 2bar(i)+4bar(j...

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  4. The P.V.'s of A, B, C are bar(i)+bar(j)+bar(k), 4bar(i)+bar(j)+bar(k),...

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  5. In a DeltaABC, P.V.'s of A, mid-point of BC are bar(i)+2bar(j)+3bar(k)...

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  6. If G is the centroid of DeltaABC then bar(GA)+bar(GB)+bar(GC)=

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  7. If G is the centroid of Delta ABC, G' is the centroid of Delta A' B' C...

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  8. If D, E are the midpoints of AB, AC of Delta ABC, then vec(B)E + vec(D...

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  9. If D is the midpoint of the side BC of a triangle ABC then bar(AB)^(2)...

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  10. Find the area of the parallelogram whose adjacent sides are bar(a) = 2...

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  11. If the diagonals of a parallelogram are bar(i)+5bar(j)-2bar(k) and -2b...

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  12. Let bar(a), bar(b), bar(c), bar(d) be the position vectors of A, B, C ...

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  13. If bar(a), bar(b) represent bar(AB), bar(BC) respectively of a regular...

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  14. When a right handed rectangular cartesian system oxyz is rotated about...

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  15. The P.V.'s of A, B are bar(a), bar(b) respectively. The P.V. of 'C' is...

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  16. The P.V.'s of A, B are bar(a), bar(b) respectively. The P.V. of 'C' is...

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  17. The vector equation to the line through the point (2, 3, 1) and parall...

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  18. Find the vector equation of the line passing through the points 2bar(i...

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  19. Cartesian equation of the line passing through the points bar(a)=2bar(...

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  20. The cartesian equation of the line passing through the points bar(a)=(...

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