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If 4th and 9th term of GP are 54 and 13122so 6th term is what |
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Answer» Answer: Heya DEAR ! The general formula for the nth term of a geometric PROGRESSION is: a(n) = ar^(n-1) a : first term r : COMMON ratio So, the terms of a geometric progression are: a, ar, ar², ar^3, ar^4, etc. Fourth term: ar^3 = 54 NINTH term: ar^8 = 13122 Dividing the 9th term by the 4th term: ar^8 / ar^3 = 13122 / 54 r^5 = 243 r = 243^(1/5) r = 3 Now we just need to figure the first term: ar^3 = 54 Plug in r=3: a(3^3) = 54 27a = 54 a = 54/27 a = 2 Answer: a(n) = 2*3^(n-1) 2, 6, 18, 54, 162, 486, etc. Hope this helps (: plz mark me as BRAINLIEST!!!!!!!!!!!!1 |
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