Question

the (n-1) th term of an ap os given by7, 12,17,22,...,is​

Answer 1

5n - 3

Step-by-step explanation:

a = 7 , d = 5

an = a + (n-1)d

    = 7 + [ (n-1) - 1] (5)                ( because here (n-1) is n and then we put -1 to

                                                  satisfy n-1)

     = 7 + (n-2)5

     = 7 + 5n - 10

      = 5n - 3

Answer 2

Step-by-step explanation:

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