﻿ What is the 5th term of this geometric sequence?100, 20, 4, 0.8, …a.124.8b.0.2c.0.16d.0.032? - AssignmentGrade.com

# What is the 5th term of this geometric sequence?100, 20, 4, 0.8, …a.124.8b.0.2c.0.16d.0.032?

QUESTION POSTED AT 26/03/2020 - 02:21 PM

Hello :
the common ratio is m 20/100=0.8/4=1/5 = 0.2= r
the nth term is :  An =A1 × r^(n-1)
if n=5  the 5th term is : A5 = 100×(0.2)^(5-1) = 100×0.16 =16

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ANSWERED AT 28/03/2020 - 12:55 PM

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ANSWERED AT 28/03/2020 - 12:55 PM

QUESTION POSTED AT 28/03/2020 - 12:55 PM

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QUESTION POSTED AT 28/03/2020 - 12:51 PM

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Check:
80(8)+50(4)=640+200=840 CHECKS.

ANSWERED AT 28/03/2020 - 12:29 PM

QUESTION POSTED AT 28/03/2020 - 12:29 PM

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ANSWERED AT 28/03/2020 - 12:25 PM

QUESTION POSTED AT 28/03/2020 - 12:25 PM

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There is a mistake in your writing
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ANSWERED AT 28/03/2020 - 12:25 PM

QUESTION POSTED AT 28/03/2020 - 12:25 PM

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ANSWERED AT 28/03/2020 - 12:21 PM

QUESTION POSTED AT 28/03/2020 - 12:21 PM

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ANSWERED AT 28/03/2020 - 12:20 PM

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