railway RRB Technician Grade 1 Mock Test 2024 Quantitative Aptitude Algebra Quadratic Equation

For which value of k does the pair of equations x2 - y2 = 0 and (x - k)2 + y2 = 1 yield a unique positive solution of x?

1
2
2
0
3
\(\sqrt{2}\)
4
\(-\sqrt{2}\)
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