Find the sum of first 25 terms of the Arithmetic sequence 5, 11, 17,....
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1st term(a)=5
second term(a2)=11
common difference(d)=11-5
=6
no of term(n)=25
we have
an=a+(n-1)d
25th term=5+(25-1)6
=5+(24)6
=5+144
25 term =149
Step-by-step explanation:
ans is 25
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