Method Of Difference Sequence And Series Pdf

method of difference sequence and series pdf

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The series of a sequence is the sum of the sequence to a certain number of terms. It is often written as S n. So if the sequence is 2, 4, 6, 8, 10, The Greek capital sigma, written S, is usually used to represent the sum of a sequence. This is best explained using an example:. This means replace the r in the expression by 1 and write down what you get. Then replace r by 2 and write down what you get. Keep doing this until you get to 4, since this is the number above the S.

Now add up all of the term that you have written down. This is the general case. For the sequence U r , this means the sum of the terms obtained by substituting in 1, 2, 3, An arithmetic progression is a sequence where each term is a certain number larger than the previous term.

The terms in the sequence are said to increase by a common difference, d. So for the sequence 3, 5, 7, 9, A geometric progression is a sequence where each term is r times larger than the previous term. The nth term of a geometric progression, where a is the first term and r is the common ratio, is:. For example, in the following geometric progression, the first term is 1, and the common ratio is 2: 1, 2, 4, 8, 16, What is the sum of the first 5 terms of the following geometric progression: 2, 4, 8, 16, 32?

In other words, if you keep adding together the terms of the sequence forever, you will get a finite value. This value is equal to:. So every time you add another term to the above sequence, the result gets closer and closer to 1. The first, second and fifth terms of an arithmetic progression are the first three terms of a geometric progression. The third term of the arithmetic progression is 5. Find the 2 possible values for the fourth term of the geometric progression.

In a geometric progression, there is a common ratio. So the ratio of the second term to the first term is equal to the ratio of the third term to the second term. We are told that the third term of the arithmetic progression is 5.

So the first term of the arithmetic progression which is equal to the first term of the geometric progression is either 5 or 1. In this case, the geometric progression is 5, 5, 5, 5, Skip to main content.

Search form. Sign up Log in. Series The series of a sequence is the sum of the sequence to a certain number of terms. The Sigma Notation The Greek capital sigma, written S, is usually used to represent the sum of a sequence. This is best explained using an example: This means replace the r in the expression by 1 and write down what you get. Arithmetic Progressions An arithmetic progression is a sequence where each term is a certain number larger than the previous term. The nth term of a geometric progression, where a is the first term and r is the common ratio, is: ar n-1 For example, in the following geometric progression, the first term is 1, and the common ratio is 2: 1, 2, 4, 8, 16, Example What is the sum of the first 5 terms of the following geometric progression: 2, 4, 8, 16, 32?

Harder Example The first, second and fifth terms of an arithmetic progression are the first three terms of a geometric progression.

JEE Main Sequences and Series Revision Notes

How many will I have in 15 weeks. You land a job as a police officer. Example: etc. Geometric series is a series in which ratio of two successive terms is always constant. Try the given examples, or type in your own Similarly 10, 5, 2. Just look at this square: On another page we asked "Does 0.

The series of a sequence is the sum of the sequence to a certain number of terms. It is often written as S n. So if the sequence is 2, 4, 6, 8, 10, The Greek capital sigma, written S, is usually used to represent the sum of a sequence. This is best explained using an example:. This means replace the r in the expression by 1 and write down what you get. Then replace r by 2 and write down what you get.

Loading DoubtNut Solution for you. QS world university rankings by subject. There are 12 Indian universities in top Check list of Indian universities in QS rankings Know complete details here. Representation of sequences and different types of series.

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Download eSaral app for free study material and video tutorials. A pack contains n cards numbered from 1 to n. Two consecutive numbered cards are removed from the pack and the sum of the numbers on the remaining cards is The sides of the right angled triangle are in arithmetic progression. If the triangle has area 24, then what is the length of its smallest side?

Loading DoubtNut Solution for you. Rajasthan Board class 12 exams will commence from 06th to 29th May, Check RBSE class 12 complete details. JEE Main paper analysis February 26, shift 2, difficulty level, student reaction.

In fact, this chapter will deal almost exclusively with series.

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In mathematics , a sequence is an enumerated collection of objects in which repetitions are allowed and order matters. Like a set , it contains members also called elements , or terms. The number of elements possibly infinite is called the length of the sequence.

The study of harmonic sequences dates to at least the 6th century bce , when the Greek philosopher and mathematician Pythagoras and his followers sought to explain through numbers the nature of the universe. One of the areas in which numbers were applied by the Pythagoreans was the study of music. In particular, Archytas of Tarentum , in the 4th century bce , used the idea of regular numerical intervals to devise a theory of musical harmony from the Greek harmonia , for agreement of sounds and the enharmonic method of tuning musical instruments. The sum of a sequence is known as a series, and the harmonic series is an example of an infinite series that does not converge to any limit. That is, the partial sums obtained by adding the successive terms grow without limit, or, put another way, the sum tends to infinity. Harmonic sequence Article Additional Info.


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Arithmetic progression AP or arithmetic sequence is a sequence of numbers in which each term after the first is obtained by adding a constant, d to the preceding term. The constant d is called common difference. If each term of an AP is increased, decreased, multiplied or divided by the same non-zero constant, the resulting sequence also will be in AP. We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners. More information Agree. Custom Search.

Sum of the series by the method of difference.

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Sum of the series by the method of difference.

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Progressions or Sequences and Series are numbers arranged in a particular order such that they form a predictable order.

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be able to use the method of differences to sum finite series, and extend its use to infinite series;. • know how to obtain Maclaurin series for well known functions.

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