The straight lines of the family x(a+b) + y (a-b) = 2a (a and b being parameters) are
A. Not concurrent
B. Concurrent at (1, -1)
C. Concurrent at (1, 1)
D. None of these
Answer:C
The straight lines of the family x(a+b) + y (a-b) = 2a (a and b being parameters) are
A. Not concurrent B. Concurrent at (1, -1) C. Concurrent at (1, 1) D. None of these