the first term of an A.P. is and the πthterm is 20. if an=399, what isπ​

1 thought on “the first term of an A.P. is and the πthterm is 20. if an=399, what isπ​”

1. Answer:

   an = a+ (n-1) d

   an = 399

   n. = 20

   a399 = a+(20-1)d

   a399= a+19d

   Step-by-step explanation:

   i think this is correct

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