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JEE Mains · Maths · STD 12 - 6. Application of derivatives

જો રેખા \(y =4 x -1\) ની સૌથી નજીક આવેલું પરવલય \(y=x^{2}+4\) પરનું બિંદુ \(P\) હોય, તો \(P\) ના યામ ...... છે.

  1. A \((3,13)\)
  2. B \((1,5)\)
  3. C \((-2,8)\)
  4. D \((2,8)\)
Verified Solution

Answer & Solution

Correct Answer

(D) \((2,8)\)

Step-by-step Solution

Detailed explanation

\(P: y=x^{2}+4\) \(k=h^{2}+4\) \(L : y =4 x -1\) \(y-4 x+1=0\) \(d = AB =\left|\frac{ k -4 h +1}{\sqrt{5}}\right|=\left|\frac{ h ^{2}-4-4 h +1}{\sqrt{5}}\right|\) \(\frac{ d ( d )}{ dh }=\frac{2 h -4}{\sqrt{5}}=0\) \(h =2\)…
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