For a sequence `{a_n}, a_1 = 2` and `a_(n+1)/a_n=1/3` then `sum_(r=1)^20 a_r` is
1,314 views · Published 12 October 2018 · 4:02 · Indexed 5 October 2026
Channel: Doubtnut · 2018 · Education
To ask Unlimited Maths doubts download Doubtnut from - https://goo.gl/9WZjCW For a sequence `{a_n}, a_1 = 2` and `a_(n+1)/a_n=1/3` then `sum_(r=1)^20 a_r` is
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