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Linex-y=1intersect the parabola y^(2)=4x at A and B. Normals at A and B intersect at C. If D is the point at which line CD is normal to the parabola, then coordinate of point D is |
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Answer» `(4,-4)` `(Sigma(x_(i)+1)^(2))/(10)=(1)/(10).Sigma(x_(1)-2+3)^(2)=(1)/(10).[Sigma(x_(i)-2)^(2)+6.Sigma(x_(i)-2)+3^(2).(10)]` `=(1)/(10).[90+6.(20-20)+90]=18` |
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