Question

20th term of a.p 3,7,11,15

Answer 1

Answer:

here is your answer

hope this helps

Answer 2

Answer:

Given first term, a = 3

          common difference, d = 4

nth term, an = a + (n-1)d

                20th term = 3 + (20-1)4

                                  = 3+ 19 × 4

                                  = 3+ 76

                                  = 79

Therefore, 20th term of the AP is 79