Question

answer the question of arithmetic progression

Answer 1

In mathematics, an arithmetic progression (AP) or arithmeticsequence is a sequence of numbers such that the difference between the consecutive terms is constant. For instance, the sequence 5, 7, 9, 11, 13, 15, . . . is an arithmetic progression with common difference of 2.

Answer 2

put 1,2,3 etc. values in the given ap u will find ap and by an formula u can find 20 th term as -

a20 =a+19d


put all values and u will get ur answer