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JEE Main 2026 Preparation: Question Papers, Solutions, Mock Tests & Strategy Unacademy » JEE Study Material » Mathematics » Binomial Theorem for Positive Integral Indices

Binomial Theorem for Positive Integral Indices

It states that "the total number of terms in the expansion is one more than the index," which is true.

Table of Content
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It is an algebraic expression that consists of two distinct terms connected by a plus or minus sign (or both). Examine the following example in order to better understand the distinction between monomial, trinomial, and binomial numbers. 

  • xy² is a two-letter abbreviation (Monomial term)
  • x-y, y+4 are the coordinates of the origin (Binomial term)
  •  x²+y+1 (trinomial term)h

The Binomial Theorem is a simple method for increasing the magnitude of a binomial expression by (that is, raising it to) enormous powers. When it comes to algebra, this is a significant topic(section). It can be applied to permutations and combinations, probability matrices, permutations, and mathematical induction, among other things. If you’re preparing for a competitive exam for university admissions or job applications, this theorem will be extremely useful to you because it is a fundamental and fundamental part of algebra. If you follow the instructions in this chapter, you will learn about a shortcut that will allow you to calculate (x + y)n without having to multiply the binomial on its own the number of times. 

A polynomial can be defined as an algebraic expression that is composed of two or more words that are subtracted from, added to, or multiplied with each other. Also included are variables, coefficients, exponents, constants, constants, and operators such as subtraction and addition, among other things. Polynomials can be divided into three types: trinomial, binomial, and monomial. 

A monomial is an algebraic term that contains only one term, whereas a trinomial is an expression that contains exactly three terms.

How to apply binomial theorem? 

When applying the Binomial Theorem, there are a few considerations to keep in mind. They are as follows:

  • By multiplying the initial word (a) by its exponents, the number n is reduced to zero.
  • The number of exponents for the term (b) ranges from zero to one hundred and fifty.
  • Exponents are equal to the sum of their exponents. The same goes for B and vice versa.
  • In both the first and last terms, the coefficients of the function are one.

Application in real-world situations of the binomial theorem:

  • When it comes to statistical and probability analysis, the binomial theorem is frequently used. It is extremely beneficial because our economy is heavily reliant on both statistics and probability analysis.
  • The Binomial Theorem is used in higher mathematics and in the field of calculation to formulate equations’ roots that have a higher power of magnitude. A large number of the most important mathematical and physical equations are proved using this method.
  • Within the Weather Forecast Services department.
  • The procedure for evaluating potential candidates.
  • Architecture, cost estimation in engineering projects, and other related fields.

What is the statement of binomial theorem for positive integral indices:

According to the Binomial theorem, “the total number of terms in an expansion is always one more than the index of the expansion.

” Take, for example, an expansion of (a + b)n; the number of terms in the expansion is n+1, whereas the index of the expression (a + b)n is n, where n is any positive integer greater than zero.

In order to expand (x + y)n , we can use the Binomial theorem, where n can be any rational number. Let’s talk about the binomial theorem for positive integral indices for the time being. 

To begin, let’s write the expansion of (x+y)n , where n is an integer, and then we’ll look at the properties of binomial expansion: 

(m+n)0=1

(m+n)¹=(m+n)

(m+n)²=m²+2mn+n²

(m+n)³=m³+3m²n+3mn²+n³

(m+n)4=m4+4m³n+6m²n²+4mn³+n4

Conclusion:

 It states that “the total number of terms in the expansion is one more than the index,” which is true. It is an algebraic expression that consists of two distinct terms connected by a plus or minus sign (or both). The Binomial Theorem is a simple method for increasing the magnitude of a binomial expression by (that is, raising it to) enormous powers. When it comes to algebra, this is a significant topic. 

A polynomial can be defined as an algebraic expression that is composed of two or more words that are subtracted from, added to, or multiplied with each other. Polynomials can be divided into three types: trinomial, binomial, and monomial. 

A monomial is an algebraic term that contains only one term, whereas a trinomial is an expression that contains exactly three terms.

When it comes to statistical and probability analysis, the binomial theorem is frequently used. The Binomial Theorem is used in higher mathematics and in the field of calculation to formulate equations’ roots that have a higher power of magnitude.

According to the Binomial theorem, “the total number of terms in an expansion is always one more than the index of the expansion. 

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Frequently Asked Questions

Get answers to the most common queries related to the IIT JEE Examination Preparation.

In what situations can binomials be used in the real world?

Answer – In real life, a wide range of binomial distributions can be observed, including the following. Consider t...Read full

What is the name of the binomial theorem that is used in weather forecasting calculations?

Answer-  Binomial theorem is a method for extending an expression that is binomial but raised by any number of fini...Read full

Why is it necessary to have an expansion of binomials?

Answer- In mathematics, the theory of binomials (also known as binomial expansion) is the result of extending the po...Read full

What exactly is the binomial maths theorem and how does it work? What do the letters n and r in a binomial theorem stand for?

Answer -This theorem in mathematics states that for any given positive integer n, the expression of nth power of any...Read full

What exactly is the index in the binomial theorem?

Answer –  It states that “the total number of terms in the expan...Read full

Answer – In real life, a wide range of binomial distributions can be observed, including the following. Consider the following scenario: a novel drug is developed to treat a disease or condition, and it either cures the disease (it is effective) or fails to treat the illness (it is unsuccessful). After purchasing a lottery ticket, you will either win cash or you will not win cash.

Answer-  Binomial theorem is a method for extending an expression that is binomial but raised by any number of finite powers to any number of powers greater than 1. When it comes to forecasting weather conditions, the binomial Theorem is also used to predict the economy of a country over the next few years, as well as the distribution of IP addresses.

Answer- In mathematics, the theory of binomials (also known as binomial expansion) is the result of extending the power of binomials or adding two terms together. Algebra, combinatorics, calculus, and other mathematical areas can benefit from the theorem and its generalisations because they allow for the demonstration of results and the solution of problems.

Answer -This theorem in mathematics states that for any given positive integer n, the expression of nth power of any two numbers a and b can be written as the sum of n + 1 terms of a particular form, where a and b are the two numbers in question. In the theorem, n – r + 1, where n is known to be equal to the exponent of any given binomial, and the symbol r represents the exponent of any given binomial.

Answer –  It states that “the total number of terms in the expansion is one more than the index,” which is true.

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