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10) Demonstrate and explain how to find the derivative of the following function. Be sure to explicity denote which derivative rules your ane using a) \( f(y)=7 y^{6}-6 y^{5}+5 y+6 \) a

Ask by Craig Knight. in the United States
Feb 26,2025

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The derivative of \( f(y) = 7y^{6} - 6y^{5} + 5y + 6 \) is \( f '(y) = 42y^{5} - 30y^{4} + 5 \).

Solution

We need to differentiate the function   f(y) = 7y⁶ – 6y⁵ + 5y + 6 To do this, we will use these derivative rules: 1. Power Rule: If f(y) = yⁿ, then f '(y) = n·yⁿ⁻¹. 2. Constant Multiple Rule: If f(y) = c·g(y), then f '(y) = c·g '(y). 3. Sum/Difference Rule: The derivative of a sum or difference is the sum or difference of the derivatives. Step-by-Step Differentiation: 1. Differentiate 7y⁶:   Using the constant multiple rule combined with the power rule,     d/dy (7y⁶) = 7 * d/dy (y⁶) = 7 * (6y⁵) = 42y⁵. 2. Differentiate –6y⁵:   Similarly,     d/dy (–6y⁵) = –6 * d/dy (y⁵) = –6 * (5y⁴) = –30y⁴. 3. Differentiate 5y:   Again using the constant multiple rule and knowing that the derivative of y is 1,     d/dy (5y) = 5 * (d/dy y) = 5 * 1 = 5. 4. Differentiate 6:   The derivative of a constant is zero,     d/dy (6) = 0. Now, combine these results to get the overall derivative:   f '(y) = 42y⁵ – 30y⁴ + 5 + 0 Thus, the final derivative is:   f '(y) = 42y⁵ – 30y⁴ + 5 This concludes the differentiation of the function, using the power, constant multiple, and sum/difference rules explicitly.

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The Deep Dive

To find the derivative of the function \( f(y) = 7y^6 - 6y^5 + 5y + 6 \), you can apply the power rule for differentiation. The power rule states that if you have a term in the form of \( ay^n \), the derivative is \( n \cdot ay^{n-1} \). Applying the power rule to each term: - The derivative of \( 7y^6 \) is \( 42y^5 \) (since \( 6 \cdot 7 = 42 \)). - The derivative of \( -6y^5 \) is \( -30y^4 \) (since \( 5 \cdot -6 = -30 \)). - The derivative of \( 5y \) is \( 5 \) (since the derivative of \( y \) is \( 1 \)). - The constant \( 6 \) has a derivative of \( 0 \). Putting it all together, the derivative \( f'(y) \) is \( 42y^5 - 30y^4 + 5 \). Finding derivatives is essential in various fields, not just math! For example, in physics, the derivative represents velocity when you're analyzing motion. Understanding how a quantity changes can help with everything from designing roller coasters to predicting weather patterns. For those interested in mastering derivatives further, there are plenty of resources you can explore, like "Calculus Made Easy" by Silvanus P. Thompson or online platforms such as Khan Academy. Grasping the fundamentals of calculus can open up a treasure trove of knowledge in both pure and applied mathematics!

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