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\(3-32\) Differentiate the function. \(y=a x^{2}+b x+c\)

Short Answer

Expert verified
The derivative is \(2ax + b\).

Step by step solution

01

Identify the Differentiation Variable

To differentiate the function, we first identify the variable with respect to which we will differentiate. Here, the variable is \(x\). The terms \(a\), \(b\), and \(c\) are constants.
02

Apply the Power Rule to \(ax^2\)

The power rule for differentiation states that if you have a function in the form \(x^n\), the derivative is \(nx^{n-1}\). For the term \(ax^2\), apply the power rule:\[\frac{d}{dx}(ax^2) = 2ax\]
03

Differentiate the Linear Term \(bx\)

The derivative of a linear function \(bx\) is simply \(b\), because the power of \(x\) is 1, and its derivative is 1 multiplied by the coefficient \(b\):\[\frac{d}{dx}(bx) = b\]
04

Differentiate the Constant Term \(c\)

The derivative of any constant \(c\) is 0 because a constant does not change with respect to \(x\):\[\frac{d}{dx}(c) = 0\]
05

Combine the Derivatives

Now combine the derivatives of each term to get the derivative of the function. The derivative of \(y = ax^2 + bx + c\) is:\[\frac{dy}{dx} = 2ax + b + 0\]This simplifies to:\[\frac{dy}{dx} = 2ax + b\]

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Differentiation
Differentiation is a key concept in calculus that involves finding the rate at which a function changes with respect to one of its variables. The process of finding this rate is called taking the derivative. In simpler terms, differentiation helps us understand how the output of a function changes as the input (in this case, the variable \(x\)) changes.

When we differentiate a function like \(y = ax^2 + bx + c\), we are determining how \(y\) changes as \(x\) changes, which results in what we call the derivative of the function. The power of differentiation lies in its ability to tell us the slope of the function at any given point, providing insight into the behavior and shape of the graph of the function. Differentiation of polynomial functions, like quadratic ones, is relatively straightforward and uses specific rules to simplify the process.
Power Rule
The power rule is one of the simplest and most widely used rules for differentiation. It applies to any term of the form \(x^n\) and states that the derivative is \(nx^{n-1}\). This means you multiply the power \(n\) by the coefficient in front of \(x\), then reduce the power by one. For instance, if we take the term \(ax^2\), using the power rule, the derivative becomes \(2ax\).

This rule is incredibly useful for differentiating polynomial functions. Each term of the polynomial can be differentiated individually using the power rule and then added together to form the derivative of the complete function. The simplicity of the power rule helps make finding derivatives of polynomials a quick and efficient process.
Linear Term
In differentiation, a linear term is any term in the function that is of the form \(bx\), where \(b\) is a constant and \(x\) is raised to the first power. Because the power of \(x\) is 1, the derivative of the linear term \(bx\) is simply \(b\). This is because the power rule simplifies to multiplying by the exponent and subtracting one from the exponent, which results in the term \(1 \cdot b \cdot x^{0} = b\).

Differentiating linear terms is straightforward and serves as a building block for more complex expressions in calculus. A thorough understanding of linear terms and their derivatives provides a groundwork for understanding the derivative of more complicated equations.
Constant Term
A constant term in mathematics is any standalone number without a variable attached to it. In the context of differentiation, the derivative of a constant is always zero. This is because constants do not change as \(x\) changes, so their rate of change is zero.

With our function \(y = ax^2 + bx + c\), the term \(c\) is a constant. Therefore, when differentiating this function, the derivative of \(c\) is \(0\). Understanding that the derivative of a constant is zero helps simplify the differentiation process, as it allows us to ignore any constant terms when calculating the derivative.

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