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a=5
d=a2-a1
=8-5
=3
n=?
an= 320
an= a+(n-1)d
320=5+(n-1)3
320-5=(n-1)3
315=(n-1)3
(n-1)= 315/3
(n-1)=105
n=105+1
n=106
therefore 320 is a term of AP and comes in the series
d=a2-a1
=8-5
=3
n=?
an= 320
an= a+(n-1)d
320=5+(n-1)3
320-5=(n-1)3
315=(n-1)3
(n-1)= 315/3
(n-1)=105
n=105+1
n=106
therefore 320 is a term of AP and comes in the series
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