3. For what value of k, the pair of linear equations 2x + ky = 1, 3x − 5y = 7 has a unique
solution?
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Unique solution
a1/a2 is not equal to b1/b2
a1 = 2
a2 = 3
b1 = k
b2= -5
a1/a2 = 2/3
b1/b2 = k/-5= -k/5
k can have any value other than -3
a1/a2 is not equal to b1/b2
a1 = 2
a2 = 3
b1 = k
b2= -5
a1/a2 = 2/3
b1/b2 = k/-5= -k/5
k can have any value other than -3
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