if vector a+b vector is equal to R vector and vector a+2b vector is perpendicular to a vector then 1) b=2R2) b=R

Question

Arun · Answer

Here we are given two lines a+ 2b and a which are inclined at 90 degrees . Thus applying dot product on these lines, a× (a+2b)=0 a^2+2ab=0 a^2=-2ab a=-2b Now a+b=r -2b+b=r Thus b+r=0. Or b=-r

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if vector a+b vector is equal to R vector and vector a+2b vector is perpendicular to a vector then 1) b=2R2) b=R

if vector a+b vector is equal to R vector and vector a+2b vector is perpendicular to a vector then 1) b=2R2) b=R

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