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The prefix poly means many. So the word polynomial refers to one or more than one term in an expression. The relationship between these terms may be sums or differences. You call expression with a single term a monomial, an expression with two terms is a binomial, and expression with three terms is a trinomial. Here we are only discussing Binomial along with their exponents.
  Properties of Binomial Theorem - and -   From the concept K = 100    Option 1)  400Option 2)  50Option 3)  200Option 4)  100
  General Term in the expansion of (x+a)^n -   - wherein Where From the concept  Coefficient of  So, r = 2 Hence,  Option 1)Option 2)Option 3)3Option 4)4