MathematicsHard249×since 2002Q2471Let P\mathrm{P}P be the plane passing through the line x−11=y−2−3=z+57\frac{x-1}{1}=\frac{y-2}{-3}=\frac{z+5}{7}1x−1=−3y−2=7z+5 and the point (2,4,−3)(2,4,-3)(2,4,−3). If the image of the point (−1,3,4)(-1,3,4)(−1,3,4) in the plane P is (α,β,γ)(\alpha, \beta, \gamma)(α,β,γ) then α+β+γ\alpha+\beta+\gammaα+β+γ is equal to :A10B12C9D11Check answerSkip