engineering mathematics MCQ #648

engineering mathematics MCQ #648

1. Question 1

   Q1. If y = log(x + √(x² + 1)), find dy/dx

   • A) 1 / √(x² + 1)
   • B) 1 / (x + √(x² + 1))
   • C) 1 / (x² + 1)
   • D) x / √(x² + 1)

   Answer: 1 / √(x² + 1)

   Explanation: Using chain rule, dy/dx = 1/(x + √(x² + 1)) * d(x + √(x² + 1))/dx = 1/√(x² + 1)