Question

What is the 25th term of this arithmetic sequence? 3,9,15,21,27

Answer 1

Answer:

75

Step-by-step explanation:

you need to divide numbers by 3

3×25=75

Answer 2

Answer:

147

Step-by-step explanation:

Arithmetic sequence:

  a = first term = 3

  d = common difference = second term - first term

     = 9 - 3

  d = 6

  n = 25

  $\sf \boxed{\bf n^{th} \ term = a + (n-1) d}$

                   = 3 + (25 - 1)*6

                   = 3 + 24*6

                    = 3 + 144

                    = 147