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If y = ln(5x^2 + 3), find dy/dx.

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Question: If y = ln(5x^2 + 3), find dy/dx.

Options:

  1. 10/(5x^2 + 3)
  2. 5/(5x^2 + 3)
  3. 2/(5x^2 + 3)
  4. 15/(5x^2 + 3)

Correct Answer: 10/(5x^2 + 3)

Solution:

dy/dx = (10x)/(5x^2 + 3) by the chain rule.

If y = ln(5x^2 + 3), find dy/dx.

Practice Questions

Q1
If y = ln(5x^2 + 3), find dy/dx.
  1. 10/(5x^2 + 3)
  2. 5/(5x^2 + 3)
  3. 2/(5x^2 + 3)
  4. 15/(5x^2 + 3)

Questions & Step-by-Step Solutions

If y = ln(5x^2 + 3), find dy/dx.
Correct Answer: dy/dx = (10x)/(5x^2 + 3)
  • Step 1: Identify the function y = ln(5x^2 + 3). This is a natural logarithm function.
  • Step 2: Recall the derivative of ln(u) is 1/u * du/dx, where u is a function of x.
  • Step 3: In our case, u = 5x^2 + 3. We need to find du/dx.
  • Step 4: Differentiate u = 5x^2 + 3. The derivative du/dx = 10x.
  • Step 5: Now apply the chain rule: dy/dx = (1/(5x^2 + 3)) * (du/dx).
  • Step 6: Substitute du/dx into the equation: dy/dx = (1/(5x^2 + 3)) * (10x).
  • Step 7: Simplify the expression: dy/dx = (10x)/(5x^2 + 3).
  • Chain Rule – The chain rule is used to differentiate composite functions, which involves taking the derivative of the outer function and multiplying it by the derivative of the inner function.
  • Natural Logarithm Derivative – The derivative of the natural logarithm function ln(u) is 1/u * du/dx, where u is a function of x.
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