Question

find the value of k,so that the following system of equation has a unique solution:x + 2y = 5 ; 3x + kx + 15 = 0.

Answer 1

For unique solution

a1/a2 ≠ b1/b2

1/3 ≠ 2/k

k ≠ 2/3.

Therefore Khan assume all values except 2/3 for a unique solution.

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