Question
Find the derivative of the function. \( s(t)=\frac{5}{t^{2}+3 t-1} \)
Ask by Clarke Edwards. in the United States
Feb 26,2025
Upstudy AI Solution
Tutor-Verified Answer
Answer
The derivative of \( s(t) = \frac{5}{t^{2} + 3t - 1} \) is \( s'(t) = -\frac{10t + 15}{(t^{2} + 3t - 1)^{2}} \).
Solution
Evaluate the derivative by following steps:
- step0: Solution:
\(\frac{d}{dt}\left(\frac{5}{t^{2}+3t-1}\right)\)
- step1: Use differentiation rules:
\(5\times \frac{d}{dt}\left(\frac{1}{t^{2}+3t-1}\right)\)
- step2: Rewrite the expression:
\(5\times \frac{d}{dt}\left(\left(t^{2}+3t-1\right)^{-1}\right)\)
- step3: Calculate the derivative:
\(5\left(-\frac{2t+3}{\left(t^{2}+3t-1\right)^{2}}\right)\)
- step4: Multiply the terms:
\(-\frac{10t+15}{\left(t^{2}+3t-1\right)^{2}}\)
- step5: Evaluate the power:
\(-\frac{10t+15}{t^{4}+7t^{2}+1+6t^{3}-6t}\)
To find the derivative of the function \( s(t) = \frac{5}{t^{2} + 3t - 1} \), we can use the quotient rule or rewrite it in a form suitable for differentiation. Here, I will use the rewritten form:
1. Rewrite the function:
\[
s(t) = 5(t^{2} + 3t - 1)^{-1}
\]
2. Apply the chain rule:
The derivative of \( s(t) \) can be calculated as follows:
\[
s'(t) = 5 \cdot (-1)(t^{2} + 3t - 1)^{-2} \cdot (2t + 3)
\]
3. Simplifying the expression:
\[
s'(t) = -\frac{5(2t + 3)}{(t^{2} + 3t - 1)^{2}}
\]
4. Further simplification leads to:
\[
s'(t) = -\frac{10t + 15}{(t^{2} + 3t - 1)^{2}}
\]
Thus, the derivative of the function \( s(t) \) is:
\[
s'(t) = -\frac{10t + 15}{(t^{2} + 3t - 1)^{2}}
\]
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Beyond the Answer
To find the derivative of the function \( s(t) = \frac{5}{t^{2} + 3t - 1} \), we can use the quotient rule or rewrite it as \( s(t) = 5 \cdot (t^{2} + 3t - 1)^{-1} \) and apply the chain rule. Using the second method, we differentiate: 1. The outer function gives us: \[ -5 (t^{2} + 3t - 1)^{-2} \] 2. The inner function \( (t^{2} + 3t - 1) \) differentiates to: \[ 2t + 3 \] Putting it all together, we have: \[ s'(t) = -5 (t^{2} + 3t - 1)^{-2} \cdot (2t + 3) \] So, the derivative is: \[ s'(t) = \frac{-5(2t + 3)}{(t^{2} + 3t - 1)^{2}} \]