A) \[x-2y+2z-3=0\]
B) \[x-2y+2z+1=0\]
C) \[x-2y+2z-1=0\]
D) \[x-2y+2z+5=0\]
Correct Answer: A
Solution :
Equation of parallel plane \[x-2y+2z+d=0\] Now \[\left| \frac{d}{\sqrt{{{1}^{2}}+{{2}^{2}}+{{2}^{2}}}} \right|=1\] \[d=\pm 3\] So equation required plane \[x-2y+2z\pm 3=0\]
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