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If ABCDEF is a regular hexagon then vec(...

If ABCDEF is a regular hexagon then `vec(AD)+vec(EB)+vec(FC)` equals :

A

0

B

2AB

C

3AB

D

4AB

Text Solution

Verified by Experts

The correct Answer is:
D

A regular hexagon ABCDEF.

We know from the hexagon that AD is parallel to BC orr `AD=2BC` is parallel to FA or EB=2FA and FC is parallel to AB or FC=2AB.
Thus, `AD+EB+FC=2BC+2FA+2AB`
`=2(FA+AB+BC)=2(FC)=2(2AB)=4AB`.
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ARIHANT MATHS-VECTOR ALGEBRA-Exercise (Single Option Correct Type Questions)
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  2. If A, B, C are the vertices of a triangle whose position vectros are v...

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  3. If ABCDEF is a regular hexagon then vec(AD)+vec(EB)+vec(FC) equals :

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  4. ABCDE is a pentagon. Forces AB,AE,DC and ED act at a point. Which forc...

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  5. In a regular hexagon ABCDEF, bar(AB) + bar(AC)+bar(AD)+ bar(AE) + bar(...

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  6. Let us define the length of a vector ahati+bhatj+chatk and |a|+|b|+|c|...

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  7. If a and b are two non-zero and non-collinear vectors then a+b and a-b...

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  8. If |veca+ vecb| lt | veca- vecb|, then the angle between veca and vecb...

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  9. The magnitudes of mutually perpendicular forces a,b and c are 2,10 and...

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  10. If hati-3hatj+5hatk bisects the angle between hata and -hati+2hatj+2ha...

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  11. Let vec a= hat i be a vector which makes an angle of 120^@ with a unit...

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  12. Given three vectors a=6hati-3hatj,b=2hati-6hatj and c=-2hati+21hatj su...

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  13. ' I ' is the incentre of triangle A B C whose corresponding sides are ...

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  14. If vec x andvec y are two non-collinear vectors and a triangle ABC wit...

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  15. If vec xa n d vec y are two non-collinear vectors and a, b, and c ...

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  16. If the resultant of two forces is equal in magnitude to one of the ...

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  17. If vec b is a vector whose initial point divides thejoin of 5 hat ...

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  18. If 4hati+ 7hatj+ 8hatk, 2hati+ 3hatj+ 4hatk and 2hati+ 5hatj+7hatk are...

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  19. If veca and vecb are two unit vectors and theta is the angle between t...

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  20. A,B,C and D have position vectors a,b,c and d, respectively, such that...

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