1 votes 1 votes let 5,8,11,14,17,20.. be series then 320 will be which term of this series A) 104 B) 106 C) 962 D) 87 Set Theory & Algebra iiith-pgee sequence-series + – Tesla! asked Apr 22, 2018 • retagged May 7, 2021 by Shiva Sagar Rao Tesla! 943 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
Best answer 3 votes 3 votes as we can see the difference between consecutive term is 3 so this is an AP series d=3 we know a=5 and Tn=320 Tn=a+(n-1)d substituting all know values we get 320=5+(n-1)3 315=(n-1)3 n-1=105 n=106 so 320 will be a 106th term of this series Tesla! answered Apr 22, 2018 • selected Feb 28, 2019 by Rishi yadav Tesla! comment Share Follow See all 0 reply Please log in or register to add a comment.
0 votes 0 votes b 2+3n is the nth term of this solution for 2+3n=320 n = 106 ankit aingh answered Apr 22, 2018 ankit aingh comment Share Follow See all 0 reply Please log in or register to add a comment.
0 votes 0 votes We can see that given series is in Arithmetic progression with first term 5 and common difference 3 so using formula Tn=a+(n-1)d where a is first term and d is common difference then 320=5+(n-1)3 solving this n-1=315/3 hence n-1=105 and n=106. Yash4444 answered Dec 26, 2019 Yash4444 comment Share Follow See all 0 reply Please log in or register to add a comment.
0 votes 0 votes 5,8,11,14,17,20,……… a=5 d=3 an = a + (n − 1) × d an=320 320=5+(n-1)3 n=106 heisenberggg answered Apr 2, 2021 heisenberggg comment Share Follow See all 0 reply Please log in or register to add a comment.