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If the second term of a g.p. is 27 and 7th term is 1/9. Find the first term and the common ratio?
2 answers
the second term of a g.p. is 27 ---> ar = 27
7th term is 1/9 ---> ar^6 = 1/9
divide them
(ar^6)/(ar) = (1/9) / 27
r^5 = 1/243 , and I know 3^5 = 243
continue
7th term is 1/9 ---> ar^6 = 1/9
divide them
(ar^6)/(ar) = (1/9) / 27
r^5 = 1/243 , and I know 3^5 = 243
continue
2 answers