Answer :
Given:
bx + ay – ab = 0 … (1)
ax + by – ab = 0 … (2)
x − y = 0 … (3)
To prove:
Sets of given three lines are concurrent.
Explanation:
Now, consider the following determinant:
-b × ab - a × ab – ab × (-a – b) = 0
Hence proved, the given lines are concurrent.
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