) ⇒M≡(3,0,−2) Also, direction ratios of PQ={4−2,−3−3,1+5} ={2,−6,6} ⇒ Direction ratios of PQ={1,−3,3}= direction ratios of normal to the plane. ∴ Equation of the plane is 1(x−3)−3(y−0)+3(z+2)=0 ⇒x−3y+3z+3=0 Comparing this to ax+by+cz+d=0, we get a=1,b−3,c=3,d=3 ∴ Minimum value of (a2+b2+c2+d2)=28