If for some \[\alpha \] and \[\beta \] in R, the intersection of the following three planes |
\[x+4y-2z=1\] |
\[x+7y-5z=\beta \] |
\[x+5y+\alpha z=5\] |
is a line in \[{{R}^{3}},\] then \[\alpha +\beta \] is equal to |
A) \[-10\]
B) \[0\]
C) \[2\]
D) 10
Correct Answer: D
Solution :
[d] \[\because \] Three equations have infinitely many solutions, soYou need to login to perform this action.
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