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in Three-dimensional geometry by (52.6k points)

Equation of the plane passing through (−1, 1, 4) and containing the line (x - 1)/3 = (y - 2)/1 = z/5 is

(A) 9x - 22y + 2z + 23 = 0 

(B) x + 22y + z = 25 

(C) 9x + 22y − 3z = 1 

(D) 22y - 9x + z = 35

1 Answer

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Best answer

Answer is (D) 22y - 9x + z = 35

Equation of any plane containing the line (x - 1)/3 = (y - 2)/1 = z/5 will be

a(x - 1) + b(y - 2) + cz = 0,

where 3a + b + 5c = 0 (1)

It is given that plane passes through (-1, 1, 4). Therefore,

-2a - b + 4c = 0 (2)

From Eqs. (1) and (2), we get

a/-9 = b/22 = c/1

Thus, the equation of required plane is 

-9(x - 1) + 22(y - 2) + z = 0

⇒ 22y - 9x + z = 35

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