The value of m such that $\frac{x-4}{1}=\frac{y-2}{1}=\frac{z+\mathrm{m}}{2}$ lies in the plane $2 x-4…

The value of m such that $\frac{x-4}{1}=\frac{y-2}{1}=\frac{z+\mathrm{m}}{2}$ lies in the plane $2 x-4 y+z=7$ is
  1. 7
  2. -7
  3. no real value
  4. 4

Solution

Point $(4,2,-\mathrm{m})$ should lie in the plane $2 x-4 y+z=7$ $\begin{array}{ll} \therefore \quad & 2(4)-4(2)-m=7 \\ & \Rightarrow m=-7 \end{array}$

Asked in: MHT CET 2024 (09 May Shift 2)

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