1.

Write the distance of the following plane from theorigin:`2x-y+2z+1=0`

Answer» Distance of a plane from origin can be given as,
`D = |d/sqrt(a^2+b^2+c^2)|`
In the given equation,
`a = 2, b = -1, c = 2, d =1`
`D = |1/sqrt(4+1+4)| = |1/sqrt9|`
`D = 1/3` units, which is the required distance.


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