Q31 of 181 Page 1080

Mark (√) against the correct answer in the following:

It is given that the vectors and are coplanar. Then, the value of λ is


Given


And


= are the coplanar.


If three vectors are coplanar, then [


[=0


⇒2[2(1+)]-2[-4(1+=0


⇒4(1+)+8(1+)=0


⇒12(1+)=0


⇒λ=-1

More from this chapter

All 181 →
29

Mark (√) against the correct answer in the following:

If and be the coterminous edges of a parallelepiped then its volume is


 30

Mark (√) against the correct answer in the following:

If the volume of a parallelepiped having and as conterminous edges, is 216 cubic units then the value of λ is


 32

Mark (√) against the correct answer in the following:

Which of the following is meaningless?


 33

Mark (√) against the correct answer in the following: