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Find the shortest distance between the line r = 2î - 2ĵ + 3k̂ + λ(î - ĵ + 4k̂) and the plane r · (î + 5ĵ + k̂) = 5.
- (10)/(9)
- (10)/(3√(3))
- (3)/(10)
- (10)/(3)
Correct answer: (10)/(3√(3))
Solution
The shortest distance from a line to a plane is found by projecting a vector from a point on the line to the plane along the direction normal to the plane. In this case, the normal vector of the plane is ( extbf{n} = extbf{i} + 5 extbf{j} + extbf{k}), and the distance can be calculated using the formula that incorporates the line's direction and the plane's equation, resulting in the correct answer of ( rac{10}{3 ext{√}3}).
Related JEE Main Maths questions
- Consider the following two statements:
Statement 1: If A, B and C are points with position vectors a = 2î + ĵ + k̂, b = 3î - ĵ + 3k̂ and c = î + 7ĵ - 5k̂, then the figure OABC forms a tetrahedron.
Statement 2: If the position vectors a, b and c of points A, B and C are non-coplanar, then OABC is a tetrahedron, where O denotes the origin.
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