KNGD785
13.11.2019 •
Mathematics
Sally is 1 year older than 3 times the age of joe .chris is 5 years younger than 6 times the age of joe if sally and chris are the same age how old is joe
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Ответ:
a(n)=ar^(n-1), a=initial term, r=common ratio, n=term number
We are given that a(5)=1/16 and r=1/4 so we can say:
1/16=a(1/4)^(5-1)
1/16=a(1/4)^4
1/16=a/256
256/16=a
16=a
So the initial term is 16 so our formula is:
a(n)=16(1/4)^(n-1)