Find the 20th term from the end of the AP:3, 8, 13, ..., 253.

Find the 20th term from the last term of the AP: 3,8,13………253.

Find the 10th term from end of A.P. 4, 9, 14, ...254?

Find the 13th term of 1,4,7,10

Find the 12th term from the end of AP 8, 10, 12, ..... , 130

Read the following Passage. Understand the Mathematical concept in it and answer the questions that follow. Each question carries 1 score. The common difference of the arithmetic sequence 15, 14, 13, 12, ....... is 14 - 15 =-1. First term of the sequence is 15 and the 15^(th) term is 15 + 14xx-1 = 15-14 = 1. Similarly the 4^(th) term is 12 and the 12^(th) term is 4. Its 16^(th) term is, x_16 = 15 + 15xx-1 = 15-15 =0 . So the sum of the first 31 term is also zero. That is n^(th) term of an arithmetic sequence with common differences -1 is m, then the m^(th) term is n and the (m+n)^(th) term is zero. What is the 21^(th) term of the arithmetic sequence 21, 20, 19, ....... ?

Find the 8^(th) term of the sequence whose first three terms are 3, 3, 6 and each term after the second is the sum of the two terms preseding it .

What is the 20^("th") term of the sequence defined by a_n=(n-1) (2-n) (3+n) ?

Find the r^th term from the end in the expansion of (x + a)^n .