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Statement 1: If the vectors veca and vec...

Statement 1: If the vectors `veca` and `vecc` are non collinear, then the lines `vecr=6veca-vecc+lamda(2vecc-veca)` and `vecr=veca-vecc+mu(veca+3vecc)` are coplanar.
Statement 2: There exists `lamda` and `mu` such that the two values of `vecr` in statement -1 become same

A

Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-1.

B

Statement-1 is True, Statement-2 is True, Statement-2 is not a correct explanation for Statement-1.

C

Statement-1 is True, Statement-2 is False.

D

Statement-1 is False, Statement-2 is True.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the problem, we need to analyze the two lines given in vector form and determine if they are coplanar and if there exist values of \( \lambda \) and \( \mu \) such that the two lines intersect. ### Step-by-Step Solution: 1. **Write down the equations of the lines:** The two lines are given as: \[ \vec{r_1} = 6\vec{a} - \vec{c} + \lambda(2\vec{c} - \vec{a}) \] \[ \vec{r_2} = \vec{a} - \vec{c} + \mu(\vec{a} + 3\vec{c}) \] 2. **Set the two equations equal to each other:** For the lines to be coplanar, we can equate the two expressions for \( \vec{r} \): \[ 6\vec{a} - \vec{c} + \lambda(2\vec{c} - \vec{a}) = \vec{a} - \vec{c} + \mu(\vec{a} + 3\vec{c}) \] 3. **Rearrange the equation:** Move all terms to one side: \[ (6 - \lambda - \mu)\vec{a} + (-1 + 2\lambda - 3\mu)\vec{c} = 0 \] 4. **Set up the system of equations:** For the above vector equation to hold, the coefficients of \( \vec{a} \) and \( \vec{c} \) must both equal zero: \[ 6 - \lambda - \mu = 0 \quad \text{(1)} \] \[ -1 + 2\lambda - 3\mu = 0 \quad \text{(2)} \] 5. **Solve the first equation for \( \lambda \):** From equation (1): \[ \lambda = 6 - \mu \] 6. **Substitute \( \lambda \) into the second equation:** Substitute \( \lambda \) into equation (2): \[ -1 + 2(6 - \mu) - 3\mu = 0 \] Simplifying this gives: \[ -1 + 12 - 2\mu - 3\mu = 0 \] \[ 11 - 5\mu = 0 \] \[ 5\mu = 11 \implies \mu = \frac{11}{5} \] 7. **Find \( \lambda \):** Substitute \( \mu \) back into the equation for \( \lambda \): \[ \lambda = 6 - \frac{11}{5} = \frac{30}{5} - \frac{11}{5} = \frac{19}{5} \] 8. **Conclusion:** We have found specific values for \( \lambda \) and \( \mu \): \[ \lambda = \frac{19}{5}, \quad \mu = \frac{11}{5} \] Since we have found values for \( \lambda \) and \( \mu \) that satisfy both equations, the two lines are coplanar, and thus, Statement 1 is true. Since we have shown that such \( \lambda \) and \( \mu \) exist, Statement 2 is also true.

To solve the problem, we need to analyze the two lines given in vector form and determine if they are coplanar and if there exist values of \( \lambda \) and \( \mu \) such that the two lines intersect. ### Step-by-Step Solution: 1. **Write down the equations of the lines:** The two lines are given as: \[ \vec{r_1} = 6\vec{a} - \vec{c} + \lambda(2\vec{c} - \vec{a}) ...
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OBJECTIVE RD SHARMA ENGLISH-PLANE AND STRAIGHT LINE IN SPACE -Section II - Assertion Reason Type
  1. Consider the planes 3x-6y-2z=15 and 2x+y-2z=5. Statement 1:The parame...

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  2. Consider three planes P(1):x-y+z=1, P(2):x+y-z=-1 and P(3):x-3y+3z=2...

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  3. Statement 1: Let A,B,C be the image of point P(a,b,c) in YZ,ZX andXY p...

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  4. Consider the plane pi:x+y-2z=3 and two points P(2,1,6) and Q(6,5,-2). ...

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  5. Statement 1: Lthe cartesian equation of the plane vecr=(hati-hatj)+lam...

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  6. Statement 1: If the vectors veca and vecc are non collinear, then the ...

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  7. Statement 1: If a is an integer the the straight lines vecr=hati+2ha...

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  8. Statement-I The lines (x-1)/(1)=(y)/(-1)=(z+1)/(1) and (x-2)/(1)=(y+1)...

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  9. Statement 1: A point on the line (x+2)/3=(y+1)/2=(z-3)/2 at a distance...

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  10. Consider the line L:vecr(hati+3hatj-hatk)+lamda(hatj+2hatk) and the pl...

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  11. Statement 1: The plane 5x+2z-8=0 contains the line 2x-y+z-3=0 and 3x+y...

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  12. Statement-I The point A(3, 1, 6) is the mirror image of the point B(1,...

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  13. Statement-I The point A(1, 0, 7) is the mirror image of the point B(1,...

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  14. The equations of two straight lines are (x-1)/2=(y+3)/1=(z-2)/(-3) a...

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  15. Given two straight lines whose equations are (x-3)/1=(y-5)/(-2)=(z-7...

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  16. Statement 1: The shortest distance between the lines x/2=y/(-1)=z/2 an...

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