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3.5k views
in Co-ordinate geometry by (284 points)

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1 Answer

+1 vote
by (1.3k points)
Let the equation of the required plane be x+y+z-1 + m(x-2y +3z) = 0

i.e.(m+1)x+ (1-2m)y + (3m +1)z-1=0

Since,

This plane makes angle of 90° with the plane x+y+z-1=0

Such that,

(m+1)+(1-2m)+(3m+1)=0

m=-3/2

Equation of the line is

x-8y+7z+2=0
by (284 points)
thank you

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