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Question : 116 of 160
Marks:
+1,
-0
Solution:
Let the line joining the points with position vectors
−2+3+5 and
7− be divide in the ratio
λ:1 by
+2+3.
∴‌=+2+3⇒‌‌(7λ−2)+3+(5−λ)=(λ+1)+2(λ+1)+3(λ+1)On equating the coefficient of
, we get
‌7λ−2‌=λ+1‌λ‌=2Hence, ratio
λ:1=2:1.
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