Solving Derivative Questions: How to Take Derivatives

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In summary, the conversation is about taking derivatives and the formula P = (doS1 + d1So) / (d1 + S1). The question is how to find the partial derivative of P with respect to S1, and the suggested solution is (denominator*d(numerator) - d(denom.)num.) / denom^2, but this gives the wrong answer. The conversation then discusses whether do and d1 are constants and how this formula relates to P(x,y)= \frac{ax+ by}{b+ x} with z= do, b= d1, x= S1, y= So. The final conclusion is that the partial derivative of P with respect to x is (den
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codec9
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I forgot how to take these derivatives. Could someone tell me the rule/work it out.

P = (doS1 + d1So) / (d1 + S1)

dP/dS1 = ?

I think it should be (denominator*d(numerator) - d(denom.)num.) / denom^2

but that gets the wrong answer.
 
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  • #2
Are do and d1 constants? In other words, is this the same as
[tex]P(x,y)= \frac{ax+ by}{b+ x}[/tex]?
with z= do, b= d1, x= S1, y= So

In that case, yes, the partial derivative of P with respect to x is "(denominator*d(numerator) - d(denom.)num.) / denom^2"
(If So is also a constant, not a variable, then it is not a partial derivative but the same rule applies.)
 
  • #3
OK, but the d(denominator) with respect to S1 which is a variable is 1, right?
 

FAQ: Solving Derivative Questions: How to Take Derivatives

What is a derivative?

A derivative is a mathematical concept that measures the rate of change of a function with respect to its input variable. It represents the slope of a tangent line at a specific point on the function's graph.

Why do we need to take derivatives?

Derivatives are useful in many areas of science, engineering, and finance. They help us understand the behavior of a function, such as how fast it is changing, its maximum and minimum values, and its concavity. They also have practical applications in optimization, physics, and economics.

How do you take a derivative?

The process of taking a derivative involves using specific rules and formulas to find the derivative of a given function. Some common techniques include the power rule, product rule, quotient rule, and chain rule. It is important to understand the basic rules and practice applying them to different functions.

What is the difference between the derivative and the anti-derivative?

The derivative of a function is the rate of change of that function at a given point, while the anti-derivative is the original function that, when differentiated, results in the given function. In other words, the anti-derivative is the inverse operation of differentiation.

Can you take derivatives of all types of functions?

In theory, derivatives can be taken for all types of functions, including polynomial, exponential, logarithmic, trigonometric, and hyperbolic functions. However, some functions may require more advanced techniques or may not have a well-defined derivative at certain points.

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