# Binomial Theorem

The following formula allows one to find the powers of a binomial. It is known as the binomial theorem.

Observe that:

The number of terms is n + 1.

The coefficients are combinatorial numbers corresponding to the nth row of Pascal's triangle.

In the development of the binomial, the exponents of a are decreasing, one by one, from n to zero; and the exponents of b are increasing, one by one, from zero to n, therefore, the sum of the exponents of a and b in each term is equal to n.

In the case that one of the terms of the binomial is negative, alternate the positive and negative signs.

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### Calculation of the Term which Occupies the Place k

#### Examples

1. Find the fifth term of the development .

2.Find the fourth term of the development is:

3.Find the eighth term of the development

4.Find the fifth term of the development .

5.Find the independent term of the development .

The exponent of a with the independent term is 0, therefore, take only the literal part and equal it to a0.

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