Question

---3 ,11 ,27 ,59 , ........ ,251
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Answer 1

Answer:

a=3,d=11-3=8,an=251

Now, an=a+(n-1)d

251=3+(n-1)8

248-3=(n-1)8

248=(n-1)8

(n-1)=248/8=31

n=31+1=32

a32=251