the (n-1) th term of an ap os given by7, 12,17,22,...,is
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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
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0
Step-by-step explanation:
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