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| 1. |
a=? d=-3 n=18 an=-5 |
| Answer» We know thatan=a+(n-1)d \'an=-5,a=?,n=18,d=-3By putting the value of An,d,n in this formula We get,-5=a+(18-1)-3-5=a+(17*-3)-5=a+(-51)\'a=51-5\'a=46 | |