Equation of plane passing through point of intersection of P1 and P2 ‌P=P1+kP‌2 ‌(x+(λ+4)y+z−1)+k(2x+y+z−2)=0 Passing through (0,1,0) and (1,0,1) ‌(λ+4−1)+k(1−2)=0 ‌(λ+3)−k=0 . . . (1) Also passing (1,0,1) ‌(1+1−1)+k(2+1−2)=0 ‌1+k=0 ‌k=−1 put in (1) ‌λ+3+1=0 ‌λ=−4 Then point (2λ,λ,−λ) ‌d=|‌