MathematicsMedium127×since 2002Q3069The locus of the centres of the circles, which touch the circle, x² + y² = 1 externally, also touch the y-axis and lie in the first quadrant, is :Ax=1+2y,y≥0x = \sqrt {1 + 2y} ,y \ge 0x=1+2y,y≥0By=1+2x,x≥0y = \sqrt {1 + 2x} ,x \ge 0y=1+2x,x≥0Cy=1+4x,x≥0y = \sqrt {1 + 4x} ,x \ge 0y=1+4x,x≥0Dx=1+4y,y≥0x = \sqrt {1 + 4y} ,y \ge 0x=1+4y,y≥0Check answerSkip