Now, use implicit differentiation to differentiate y = (3√t)^t with respect to t, treating y as a differentiable function of t.

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Understand the Problem

The question is asking to use implicit differentiation on the given equation where y is defined in terms of t. We will differentiate both sides of the equation with respect to t, treating y as a differentiable function of t.

Answer

$$ \frac{dy}{dt} = (3\sqrt{t})^t \left( \ln(3\sqrt{t}) + \frac{1}{2} \right) $$
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The derivative is

$$ \frac{dy}{dt} = (3\sqrt{t})^t \left( \ln(3\sqrt{t}) + \frac{1}{2} \right) $$

Steps to Solve

  1. Identify the equation We start with the equation given:

$$ y = (3\sqrt{t})^t $$

  1. Take the natural logarithm of both sides Using logarithmic differentiation, we take the natural log of both sides to simplify.

$$ \ln(y) = \ln((3\sqrt{t})^t) $$

Using the property of logarithms, we can bring down the exponent:

$$ \ln(y) = t \cdot \ln(3\sqrt{t}) $$

  1. Differentiate both sides with respect to ( t ) Now we differentiate both sides. Remember that when differentiating ( y ), we apply the chain rule, giving us:

$$ \frac{1}{y} \frac{dy}{dt} = \frac{d}{dt}(t \cdot \ln(3\sqrt{t})) $$

  1. Differentiate the right side We apply the product rule on the right side:

$$ \frac{d}{dt}(t \cdot \ln(3\sqrt{t})) = \frac{d}{dt}(t) \cdot \ln(3\sqrt{t}) + t \cdot \frac{d}{dt}(\ln(3\sqrt{t})) $$

The derivative of ( t ) is ( 1 ), and we need to find the derivative of ( \ln(3\sqrt{t}) ):

  1. Differentiate ( \ln(3\sqrt{t}) ) Using the properties of logarithms:

$$ \ln(3\sqrt{t}) = \ln(3) + \frac{1}{2} \ln(t) $$

Thus,

$$ \frac{d}{dt}(\ln(3\sqrt{t})) = 0 + \frac{1}{2} \cdot \frac{1}{t} = \frac{1}{2t} $$

  1. Combine results So, we have:

$$ \frac{1}{y} \frac{dy}{dt} = \ln(3\sqrt{t}) + t \cdot \frac{1}{2t} $$

This simplifies to:

$$ \frac{1}{y} \frac{dy}{dt} = \ln(3\sqrt{t}) + \frac{1}{2} $$

  1. Solve for ( \frac{dy}{dt} ) Multiply both sides by ( y ):

$$ \frac{dy}{dt} = y \left( \ln(3\sqrt{t}) + \frac{1}{2} \right) $$

Finally, substitute back ( y = (3\sqrt{t})^t ):

$$ \frac{dy}{dt} = (3\sqrt{t})^t \left( \ln(3\sqrt{t}) + \frac{1}{2} \right) $$

The derivative is

$$ \frac{dy}{dt} = (3\sqrt{t})^t \left( \ln(3\sqrt{t}) + \frac{1}{2} \right) $$

More Information

This method of using implicit differentiation and logarithmic properties simplifies the differentiation process, especially when dealing with functions with variables in both the base and exponent.

Tips

  • Forgetting to apply the chain rule when differentiating ( y ).
  • Not simplifying the logarithm before differentiation.
  • Misapplying the product rule.

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