Question

In an Arthimetic progression if, 10th term is 41 and 20th term is 81, then it's common difference is;

Answer 1

Answer:

let's take the first term as a and common difference as d so second term is a+d And hence nth term of the Arithematic progression will be a+(n-1)d . So 10th term and 20th term are a+9d and a+19d respectively so difference between them is 10d = 81-41 =40 . Hence common difference of this AP is 4.