Chrismaehilladocolesid
Answered

3. A = { 1,13, 25, 37,49,..} Find the general formula and find the 121st term.​

Sagot :

Rimurutheslimegreatsid

Answer:

general formula: an= 12n-11

121st term: a121= 1441

Step-by-step explanation:

find the common difference (d) first from second term minus the first term or any succeeding term minus preceding term

so, d= 13-1 = 12

  1. finding general formula

            an= a1+(n-1)d

            an= 1+(n-1)12

            an= 1+12n-12

            an= 12n-11

    2. an= 12n-11

       a121= 12(121)-11

       a121= 1452-11

       a121= 1441