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Multiple choice

If the circle ${x^2} + {y^2} = {a^2}$ cuts off a chord of length $2b$ from the line $y= mx + c$,then

  1. $(1 - {m^2})({a^2} - {b^2}) = {c^2}$
  2. $(1 + {m^2})({a^2} - {b^2}) = {c^2}$
  3. $(1 - {m^2})({a^2} + {b^2}) = {c^2}$
  4. $None\ of\ these$
Reveal answer Fill a bubble to check yourself
D Correct answer

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