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Question : 113 of 118
Marks:
+1,
-0
Solution:
Given
=++,=−+2 and
=x+(x−2)− If
lies in the plane of
and
then
[]=0 i.e.
||=0 ⇒1[1−2(x−2)]−1[−1−2x]+1[x−2+x]=0 ⇒1−2x+4+1+2x+2x−2=0⇒2x=−4‌‌⇒x=−2
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