RRB Government Jobs Exams

For what value of the constant K does the equation Kx^2 + 2x = 1 have two real solutions?

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RRB Other Question

For what value of the constant K does the equation 2x + Kx = 3 have one solution? For what value of the constant K does the system of equations 2x - y = 4 and 6x-3y=3K have an infinite number of solutions?