In an AP if d=4,n=7,an=4,then a is

1.	In an AP if d=4,n=7,an=4,then a is
Answer» an = a+(n-1)d4 = a+(7-1)×44 = a+ 6×44 = a+ 124-12= a-8 = aSo,a= -8 I think -20

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