Which term of ap : 3,8,13,18,...is18

1.	Which term of ap : 3,8,13,18,...is18
Answer» Given a=3,d=8-3=5,an=18An=a+(n-1)×d18=3+(n-1)×518-3/5=n-13=n-1N=3+1=4Ans:4th term of ap is 18 4th term of AP 4 th The given sequence is 3, 8, 13, 18, ....78.\'a\' = 3, \'d\' = 5, last term = 78, \'n\' = ?tn\u200b=a+(n−1)d⟹78=3+(n−1)5⟹78=3+5n−5⟹78=5n−2⟹5n=80orn=16.The 16th term is 78.

Discussion