A) \[\alpha =\beta =\gamma =1only\]
B) \[\alpha =\beta =\gamma =\frac{3}{7}only\]
C) \[\alpha =\beta =\gamma \]
D) None of the above
Correct Answer: C
Solution :
[c] Given equation of planes are: \[x+y+z=7\] and \[\alpha x+\beta y+\gamma z=3\] For these planes to be parallel, coefficients of x, y and z should be same i.e. \[\Rightarrow \alpha =\beta =\gamma \]
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