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If the vectors 3hati+2hatj-hatk and 6hat...

If the vectors `3hati+2hatj-hatk and 6hati-4xhatj+yhatk` are parallel, then the value of x and y will be

A

`-1,-2`

B

`1,-2`

C

`-1,2`

D

`1,2`

Text Solution

Verified by Experts

The correct Answer is:
A
Obviously, `(3)/(6)=(2)/(-4x)=-(1)/(y)`
`implies x=-1 and y=-2`.
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ARIHANT MATHS-VECTOR ALGEBRA-Exercise (Single Option Correct Type Questions)
  1. If the points a+b,a-b and a+kb be collinear, then k is equal to

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  2. If the position vectors of A,B,C and D are 2hati+hatj,hati-3hatj,3hat...

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  3. If the vectors 3hati+2hatj-hatk and 6hati-4xhatj+yhatk are parallel, t...

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  4. Theorem 1: If a and b are two non collinear vectors; then every vector...

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  5. Four non zero vectors will always be a. linearly dependent b. linea...

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  6. The vectors a,b and a+b are

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  7. Find the all the values of lamda such that (x,y,z)!=(0,0,0)and x(hati+...

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  8. The number of integral values of p for which (p+1) hati-3hatj+phatk, p...

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  9. The vectors vec(AB)=3hati+4hatk and vec(AC)=5hati-2hatj+4hatk are the ...

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  10. In the figure, a vectors x satisfies the equation x-w=v. then, x is eq...

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  11. Vectors veca = hati+2hatj+3hatk, vec b = 2hati-hatj+hatk and vecc= 3ha...

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  12. If OP=8 and OP makes angles 45^(@) and 60^(@) with OX-axis and OY-axis...

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  13. Let a,b and c be three unit vectors such that 3a+4b+5c=0. Then which o...

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  14. If A, B, C, D and E are five coplanar points, then the value of bar(D...

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  15. If the vectors vec a and vec bare linearly independent and satisfying ...

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  16. The unit vector bisecting vec(OY) and vec(OZ) is

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  17. A line passes through the points whose position vectors are hati+hatj-...

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  18. If D, E and F be the middle points of the sides BC,CA and AB of the De...

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  19. If P and Q are the middle points of the sides BC and CD of the paralle...

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  20. If the figure formed by the four points hati+hatj-hatk,2hati+3hatj,3ha...

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