Dear aspirant,
If the line lies on the plane that means each and every point on the line lies on the plane 2x-4y+z=7 so the point (4,2,k) should lie on the plane so put this point in the equation of plane you will get the value of k as 7 .
I hope it was helpful!!
Question : $\text { If } x^2+y^2+z^2=x y+y z+z x \text { and } x=1 \text {, then find the value of } \frac{10 x^4+5 y^4+7 z^4}{13 x^2 y^2+6 y^2 z^2+3 z^2 x^2}$.
Option 1: 2
Option 2: 0
Option 3: –1
Option 4: 1
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