Question

pls solve this question 20 very urgent

Answer 1

In the sequence 3,11,19,27,.......
t1=3,t2=11 ,t3=19, t4=27,.......
t2-t1=11-3=8
t3-t2=19-11=8
.
. . This is the sequence of A.P .
First term a=3 and d=8
then, tn= a+(n-1)d
.
. . 137= 5+(n-1)8
= 5+8n-8
8n=140
n= 140/8
n=18



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