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Often "domain" means something like "I wrote down a formula, but my formula doesn't make sense everywhere. Enjoy live Q&A or pic answer. A relative maximum is a point on a function where the function has the highest value within a certain interval or region. Anyhow, if we are to be proper and mathematical about this, it seems to me that the issue with understanding what it means for a function to be defined on a certain set is with whatever definition of `function' you are using. Here is the sentence: If a real-valued function $f$ is defined and continuous on the closed interval $[a, b]$ in the real line, then $f$ is bounded on $[a, b]$. Given the sigma algebra, you could recover the "ground set" by taking the union of all the sets in the sigma-algebra. I am having difficulty in explaining the terminology "defined" to the students I am assisting. To know more about relative maximum refer to: #SPJ4. Later on when things are complicated, you need to be able to think very clearly about these things. If $(x, y) \in f$, we write $f(x) = y$. Calculus - How to explain what it means to say a function is "defined" on an interval. Therefore, The values for x at which f has a relative maximum are -3 and 4. Crop a question and search for answer.

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Unlimited answer cards. Provide step-by-step explanations. The way I was taught, functions are things that have domains. Get solutions for NEET and IIT JEE previous years papers, along with chapter wise NEET MCQ solutions. If it's just a precalculus or calculus course, I would just give examples of a nice looking formula that "isn't defined" on all of an interval, e. g. $\log(x)$ on [-.

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High accurate tutors, shorter answering time. I support the point made by countinghaus that confusing a function with a formula representing a function is a really common error. For example, a function may have multiple relative maxima but only one global maximum. In general the mathematician's notion of "domain" is not the same as the nebulous notion that's taught in the precalculus/calculus sequence, and this is one of the few cases where I agree with those who wish we had more mathematical precision in those course. It has helped students get under AIR 100 in NEET & IIT JEE. Let f be a function defined on [a, b] such that f^(prime)(x)>0, for all x in (a ,b). Then prove that f is an increasing function on (a, b. Ask a live tutor for help now. Check the full answer on App Gauthmath. Unlimited access to all gallery answers. Doubtnut helps with homework, doubts and solutions to all the questions. Doubtnut is the perfect NEET and IIT JEE preparation App. Get all the study material in Hindi medium and English medium for IIT JEE and NEET preparation. It's also important to note that for some functions, there might not be any relative maximum in the interval or domain where the function is defined, and for others, it might have a relative maximum at the endpoint of the interval. On plotting the zeroes of the f(x) on the number line we observe the value of the derivative of f(x) changes from positive to negative indicating points of relative maximum.

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We solved the question! For example, a measure space is actually three things all interacting in a certain way: a set, a sigma algebra on that set and a measure on that sigma algebra. However, I also guess from other comments made that there is a bit of a fuzzy notion present in precalculus or basic calculus courses along the lines of 'the set of real numbers at which this expression can be evaluated to give another real number'....? We may say, for any set $S \subset A$ that $f$ is defined on $S$. Always best price for tickets purchase. It's important to note that a relative maximum is not always an actual maximum, it's only a maximum in a specific interval or region of the function. I agree with pritam; It's just something that's included. If it's an analysis course, I would interpret the word defined in this sentence as saying, "there's some function $f$, taking values in $\mathbb{R}$, whose domain is a subset of $\mathbb{R}$, and whatever the domain is, definitely it includes the closed interval $[a, b]$. 1 Study App and Learning App with Instant Video Solutions for NCERT Class 6, Class 7, Class 8, Class 9, Class 10, Class 11 and Class 12, IIT JEE prep, NEET preparation and CBSE, UP Board, Bihar Board, Rajasthan Board, MP Board, Telangana Board etc. Let f be a function defined on the closed interval notation. It is a local maximum, meaning that it is the highest value within a certain interval, but it may not be the highest value overall. 31A, Udyog Vihar, Sector 18, Gurugram, Haryana, 122015.

We write $f: A \to B$. Can I have some thoughts on how to explain the word "defined" used in the sentence? Gauthmath helper for Chrome. 5, 2] or $1/x$ on [-1, 1]. Get PDF and video solutions of IIT-JEE Mains & Advanced previous year papers, NEET previous year papers, NCERT books for classes 6 to 12, CBSE, Pathfinder Publications, RD Sharma, RS Aggarwal, Manohar Ray, Cengage books for boards and competitive exams. NCERT solutions for CBSE and other state boards is a key requirement for students. Tell me where it does make sense, " which I hate, especially because students are so apt to confuse functions with formulas representing functions. Let f be a function defined on the closed interval and open. A function is a domain $A$ and a codomain $B$ and a subset $f \subset A\times B$ with the property that if $(x, y)$ and $(x, y')$ are both in $f$, then $y=y'$ and that for every $x \in A$ there is some $y \in B$ such that $(x, y) \in f$.

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