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TS EAMCET · Maths · Application of Derivatives

If the two curves x=y2 and xy=k cut each other at right angles, then a possible value of k is

  1. A 18
  2. B 12
  3. C 12
  4. D 122
Verified Solution

Answer & Solution

Correct Answer

(D) 122

Step-by-step Solution

Detailed explanation

y2=x             .....i Since, y2≥0⇒x≥0 ⇒2ydydx=1 ⇒dydx=12y=m1(slope of tangent) xy=k          .....ii ⇒y+xdydx=0…
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