Jambmaths question:
If the lines $2y-kx+2=0$and $y+x-\tfrac{k}{2}=0$intersect at (1, – 2). Find the value of k
Option A:
– 1
Option B:
– 2
Option C:
– 3
Option D:
– 4
Jamb Maths Solution:
Substitute the value (x, y) = (1, –2) into any of the equation to obtain the value of k
Using $2y-kx+2=0$, substituting x =1 and y = – 2 respectively into the equation
$2(-2)-k(1)+2=0,\text{ }k=-2$
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