Problem

Find dy/dx y=(3x)/8

The question provided is asking for the derivative of the function y with respect to the variable x, where the function y is defined as y=(3x)/8. Specifically, it wants you to apply differentiation techniques to find the rate at which y changes as x changes, which is a fundamental concept in calculus. This process involves applying the rules of differentiation to the given algebraic expression to calculate dy/dx, which is the notation used for the derivative of y with respect to x.

$y = \frac{3 x}{8}$

Answer

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Solution:

Step 1:

Apply the differentiation operator to both sides of the equation: $\frac{d}{dx}(y) = \frac{d}{dx}\left(\frac{3x}{8}\right)$.

Step 2:

The derivative of $y$ with respect to $x$ is denoted as $\frac{dy}{dx}$.

Step 3:

Proceed to differentiate the expression on the right side.

Step 3.1:

Recognize that $\frac{3}{8}$ is a constant factor and can be pulled out of the derivative: $\frac{3}{8}\frac{d}{dx}(x)$.

Step 3.2:

Apply the Power Rule for differentiation, which asserts that the derivative of $x^n$ is $nx^{n-1}$, where in this case, $n=1$: $\frac{3}{8} \cdot 1$.

Step 3.3:

Simplify by multiplying $\frac{3}{8}$ with $1$: $\frac{3}{8}$.

Step 4:

Combine the results to form the complete derivative equation: $\frac{dy}{dx} = \frac{3}{8}$.

Step 5:

Substitute $\frac{dy}{dx}$ for $y$ in the derivative equation: $\frac{dy}{dx} = \frac{3}{8}$.

Knowledge Notes:

  1. Differentiation is a fundamental concept in calculus that measures how a function changes as its input changes. The derivative of a function at a point is the slope of the tangent line to the function at that point.

  2. The notation $\frac{d}{dx}$ represents the differentiation operator with respect to the variable $x$.

  3. The Power Rule is a basic differentiation rule that states if $f(x) = x^n$, then $f'(x) = nx^{n-1}$, where $n$ is a real number.

  4. Constants, such as $\frac{3}{8}$ in this problem, are unaffected by the differentiation operator and can be factored out.

  5. When differentiating a simple linear function such as $f(x) = x$, the result is 1 since the slope of the function is constant and equal to 1.

  6. After differentiating both sides of an equation with respect to $x$, it's important to correctly notate the derivative of $y$ with respect to $x$ as $\frac{dy}{dx}$.

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