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Question : 120 of 160
Marks:
+1,
-0
Solution:
Let
a=3+3+√3,b=+ and
c=√3+√3+λSince, these vectors are coplanar
‌∴‌‌a⋅(b×c)=0‌⇒‌‌||=0‌⇒‌‌3(0−√3)−3(λ−√3)+√3(√3−0)=0‌⇒‌‌−3√3−3λ+3√3+3=0‌⇒‌‌λ=1‌
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