Find the sum of the finite geometric series. 4 20 100 ... 312,500 the sum of the geometric series is .
1 answer:
What is the 9th term of the geometric sequence 4, -20, 100, ... <span>First term, a = 4 </span> <span>common ratio, r = –20 / 4 = –5 </span> <span>..... ..... ..... ..... = 100 / –20 = –5 </span> <span>9th term = 4 ( –5 ) ^ ( 9 - 1 ) </span> <span>..... ...... = 4 ( –5 ) ^ 8 </span> <span>..... ...... = 4 ( 390,625 ) </span> <span>..... ...... = 1,562,500 </span>
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