Find out the arithematic pragression of p,p+90,p+180, p+270,......where p =(999)to the power 999

Find out the arithematic pragression of p,p+90,p+180, p+270,......wher

1.	Find out the arithematic pragression of p,p+90,p+180, p+270,......where p =(999)to the power 999
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