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MathsHardMCQ2018 · 15 Apr Shift 1 Online

Q72.If the tangents drawn to the hyperbola 4y2 = x2+ 1 intersect the co-ordinate axes at the distinct points A and B, then the locus of the mid point of AB is (1) x2 −4y2 + 16x2y2 = 0 (2) 4x2 −y2 + 16x2y2 = 0 (3) 4x2 −y2 −16x2y2 = 0 (4) x2 −4y2 −16x2y2 = 0

What This Question Tests

This question tests the ability to find the equation of a tangent to a hyperbola, determine its intercepts on the coordinate axes, and then derive the locus of the midpoint of these intercepts.

Concepts Tested

Equation of tangent to hyperbolaIntercepts on coordinate axesMidpoint formulaFinding locus

Formulas Used

Hyperbola: x²/a² - y²/b² = 1

Tangent at (x1, y1): xx1/a² - yy1/b² = 1

Midpoint (h, k)

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