Question

12thterm of an AP is 4 it's 20th term is -20.Find the nth term of that AP​

Answer 1

Answer:

40-3n

Step-by-step explanation:

a+11d=4----(1)

a+19d=-20-----(2)

(2)-(1),

d=-3

a=4+33

37

an= a+(n-1)d

=37-3n+3

=40-3n

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