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JEE Mains · Maths · STD 12 - 7.1 indefinite integral

यदि \(\int e^{\sec x}\left(\sec x \tan x f(x)+\left(\sec x \tan x+\sec ^{2} x\right) d x\right.\) \(=e^{\sec x} f(x)+C\), तो \(f(x)\) का एक संभव विकल्प (choice) है 

  1. A \(\sec \,x - \tan \,x - \frac{1}{2}\)
  2. B \(x\,\sec \,x + \tan \,x + \frac{1}{2}\)
  3. C \(\,\sec \,x + x\,\tan \,x - \frac{1}{2}\)
  4. D \(\,\sec \,x + \tan \,x + \frac{1}{2}\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(\,\sec \,x + \tan \,x + \frac{1}{2}\)

Step-by-step Solution

Detailed explanation

\(\int e^{\sec x}\left(\sec x+\tan x f(x)+\left(\sec x \tan x+\sec ^{2} x\right)\right) d x\) \(=e^{\sec x} f(x)+C\) Diff. both side w.r.t. \(x\) \(=e^{\sec x}\left(\sec x+\tan x+f(x)+\left(\sec x \tan x+\sec ^{2} x\right)\right)\)…
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