To investigate local extrema in a mathematical function, you first find the critical points by setting the derivative of the function equal to zero and solving for the variable. Then, you use the second derivative test to determine whether each critical point corresponds to a local maximum, local minimum, or neither. If the second derivative is positive at a critical point, the function has a local minimum at that point; if the second derivative is negative, the function has a local maximum at that point. If the second derivative is zero or undefined, the test is inconclusive and you may need to use other methods to determine the nature of the critical point. **

Investigate whether the line of research you are pursuing has been previously explored by other researchers. Look for relevant studies, articles, and publications in academic databases to see if there is existing literature on the topic. This will help you understand the current state of knowledge in the field and identify any gaps or areas for further investigation. Additionally, consider reaching out to experts in the field or attending conferences to gather more insights and perspectives on your research topic. **

Yes, the police will likely investigate any reported crime or incident that falls within their jurisdiction. They have a duty to uphold the law and ensure public safety, so they will take any allegations seriously and conduct a thorough investigation to gather evidence and determine the facts of the case. It is important to report any suspicious or criminal activity to the police so that they can take appropriate action. **

Math for independence refers to the concept of events being unrelated or not affecting each other. In probability theory, two events are considered independent if the occurrence of one event does not affect the probability of the other event occurring. This concept is important in various fields such as statistics, economics, and engineering, as it allows for the analysis of the likelihood of multiple events occurring simultaneously. Math for independence is a fundamental concept in understanding the relationships between different events and their probabilities. **

The amount at which the police investigate online fraud can vary depending on the jurisdiction and the specific circumstances of the case. In general, law enforcement agencies may prioritize cases involving larger sums of money, typically in the thousands of dollars or more. However, even smaller amounts of online fraud can be investigated if they are part of a larger pattern of criminal activity or if they have a significant impact on victims. It's important to report any suspected online fraud to the authorities, regardless of the amount involved, as it can help prevent further criminal activity and protect others from falling victim to similar scams. **

One can investigate monotony by observing patterns and repetitions in a given situation or behavior. This can involve tracking changes over time, analyzing data for consistent trends, or conducting experiments to see how variations in certain factors affect monotony. Additionally, interviewing individuals who are experiencing monotony can provide insights into their thoughts and feelings about the repetitive nature of their experiences. Overall, investigating monotony requires a combination of observation, analysis, and qualitative research methods. **

Plane crews investigate a variety of issues related to the operation and safety of the aircraft. This can include conducting pre-flight checks to ensure the plane is in proper working order, investigating any unusual sounds or malfunctions during flight, and addressing any issues that arise with the plane's systems or equipment. Additionally, plane crews may investigate weather conditions, air traffic control instructions, and other factors that could impact the safety and efficiency of the flight. Overall, the goal of these investigations is to ensure the safety and smooth operation of the aircraft. **

To investigate convergence, one can use various methods such as the ratio test, the root test, the comparison test, or the integral test. These tests help determine whether a series converges or diverges by examining the behavior of its terms. The ratio test and the root test are particularly useful for determining convergence of series with factorial or exponential terms, while the comparison test can be used to compare the given series with a known convergent or divergent series. The integral test involves comparing the given series with an improper integral to determine convergence. Overall, investigating convergence involves applying these tests and methods to analyze the behavior of the series and determine its convergence or divergence. **